1405243125 has 120 divisors (see below), whose sum is σ = 2981570592. Its totient is φ = 628560000.

The previous prime is 1405243123. The next prime is 1405243127. The reversal of 1405243125 is 5213425041.

1405243125 is a `hidden beast` number, since 1 + 405 + 243 + 12 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (1405243123) and next prime (1405243127).

It is not a de Polignac number, because 1405243125 - 2¹ = 1405243123 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1405243123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 803502 + ... + 805248.

Almost surely, 2^1405243125 is an apocalyptic number.

1405243125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1405243125 is an abundant number, since it is smaller than the sum of its proper divisors (1576327467).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1405243125 is a wasteful number, since it uses less digits than its factorization.

1405243125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1797 (or 1779 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 1405243125 is about 37486.5725960643. The cubic root of 1405243125 is about 1120.0837323135.

Adding to 1405243125 its reverse (5213425041), we get a palindrome (6618668166).

The spelling of 1405243125 in words is "one billion, four hundred five million, two hundred forty-three thousand, one hundred twenty-five".