2154242125 has 72 divisors (see below), whose sum is σ = 3324949992. Its totient is φ = 1389158400.

The previous prime is 2154242113. The next prime is 2154242137. The reversal of 2154242125 is 5212424512.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2154242113) and next prime (2154242137).

It can be written as a sum of positive squares in 12 ways, for example, as 1079648164 + 1074593961 = 32858^2 + 32781^2 .

It is not a de Polignac number, because 2154242125 - 2⁵ = 2154242093 is a prime.

Its product of digits (6400) is a multiple of the sum of its prime factors (1280).

It is a junction number, because it is equal to n+sod(n) for n = 2154242093 and 2154242102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1769517 + ... + 1770733.

It is an arithmetic number, because the mean of its divisors is an integer number (46179861).

Almost surely, 2^2154242125 is an apocalyptic number.

2154242125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2154242125 is a deficient number, since it is larger than the sum of its proper divisors (1170707867).

2154242125 is a wasteful number, since it uses less digits than its factorization.

2154242125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1280 (or 1246 counting only the distinct ones).

The product of its digits is 6400, while the sum is 28.

The square root of 2154242125 is about 46413.8139458502. The cubic root of 2154242125 is about 1291.5111839671.

Adding to 2154242125 its reverse (5212424512), we get a palindrome (7366666637).

The spelling of 2154242125 in words is "two billion, one hundred fifty-four million, two hundred forty-two thousand, one hundred twenty-five".