25285091 has 4 divisors (see below), whose sum is σ = 27230112. Its totient is φ = 23340072.

The previous prime is 25285061. The next prime is 25285093. The reversal of 25285091 is 19058252.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25285091 - 2¹⁰ = 25284067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25285093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 972491 + ... + 972516.

It is an arithmetic number, because the mean of its divisors is an integer number (6807528).

Almost surely, 2^25285091 is an apocalyptic number.

25285091 is a deficient number, since it is larger than the sum of its proper divisors (1945021).

25285091 is a wasteful number, since it uses less digits than its factorization.

25285091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1945020.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 25285091 is about 5028.4282832710. The cubic root of 25285091 is about 293.5090569292.

The spelling of 25285091 in words is "twenty-five million, two hundred eighty-five thousand, ninety-one".