25149101 has 6 divisors (see below), whose sum is σ = 25449102. Its totient is φ = 24850200.

The previous prime is 25149043. The next prime is 25149127. The reversal of 25149101 is 10194152.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 24900100 + 249001 = 4990^2 + 499^2 .

It is not a de Polignac number, because 25149101 - 2⁶ = 25149037 is a prime.

It is a super-2 number, since 2×25149101² = 1264954562216402, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25149151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50150 + ... + 50648.

It is an arithmetic number, because the mean of its divisors is an integer number (4241517).

Almost surely, 2^25149101 is an apocalyptic number.

It is an amenable number.

25149101 is a deficient number, since it is larger than the sum of its proper divisors (300001).

25149101 is an frugal number, since it uses more digits than its factorization.

25149101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1099 (or 600 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 25149101 is about 5014.8879349393. The cubic root of 25149101 is about 292.9819206308.

The spelling of 25149101 in words is "twenty-five million, one hundred forty-nine thousand, one hundred one".