25087121 has 8 divisors (see below), whose sum is σ = 27211464. Its totient is φ = 23034880.

The previous prime is 25087109. The next prime is 25087123. The reversal of 25087121 is 12178052.

It can be written as a sum of positive squares in 4 ways, for example, as 5382400 + 19704721 = 2320^2 + 4439^2 .

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 25087121 - 2⁶ = 25087057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25087123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17300 + ... + 18693.

It is an arithmetic number, because the mean of its divisors is an integer number (3401433).

Almost surely, 2^25087121 is an apocalyptic number.

It is an amenable number.

25087121 is a deficient number, since it is larger than the sum of its proper divisors (2124343).

25087121 is a wasteful number, since it uses less digits than its factorization.

25087121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36051.

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 25087121 is about 5008.7045231277. The cubic root of 25087121 is about 292.7410378315.

The spelling of 25087121 in words is "twenty-five million, eighty-seven thousand, one hundred twenty-one".