25415121 has 8 divisors (see below), whose sum is σ = 34713504. Its totient is φ = 16530080.

The previous prime is 25415111. The next prime is 25415129. The reversal of 25415121 is 12151452.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25415121 - 2⁶ = 25415057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25415129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103191 + ... + 103436.

It is an arithmetic number, because the mean of its divisors is an integer number (4339188).

Almost surely, 2^25415121 is an apocalyptic number.

It is an amenable number.

25415121 is a deficient number, since it is larger than the sum of its proper divisors (9298383).

25415121 is a wasteful number, since it uses less digits than its factorization.

25415121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206671.

The product of its digits is 400, while the sum is 21.

The square root of 25415121 is about 5041.3411905960. The cubic root of 25415121 is about 294.0113258629.

Adding to 25415121 its reverse (12151452), we get a palindrome (37566573).

The spelling of 25415121 in words is "twenty-five million, four hundred fifteen thousand, one hundred twenty-one".