25140091 has 4 divisors (see below), whose sum is σ = 25458400. Its totient is φ = 24821784.

The previous prime is 25140067. The next prime is 25140109. The reversal of 25140091 is 19004152.

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 25140091 - 2⁹ = 25139579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25140061) 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 3 ways as a sum of consecutive naturals, for example, 159036 + ... + 159193.

It is an arithmetic number, because the mean of its divisors is an integer number (6364600).

Almost surely, 2^25140091 is an apocalyptic number.

25140091 is a deficient number, since it is larger than the sum of its proper divisors (318309).

25140091 is an equidigital number, since it uses as much as digits as its factorization.

25140091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318308.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 25140091 is about 5013.9895293070. The cubic root of 25140091 is about 292.9469282280.

The spelling of 25140091 in words is "twenty-five million, one hundred forty thousand, ninety-one".