25870867 has 4 divisors (see below), whose sum is σ = 28222776. Its totient is φ = 23518960.

The previous prime is 25870861. The next prime is 25870891. The reversal of 25870867 is 76807852.

It is a happy number.

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 25870867 - 2⁷ = 25870739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25870861) 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, 1175938 + ... + 1175959.

It is an arithmetic number, because the mean of its divisors is an integer number (7055694).

Almost surely, 2^25870867 is an apocalyptic number.

25870867 is a deficient number, since it is larger than the sum of its proper divisors (2351909).

25870867 is a wasteful number, since it uses less digits than its factorization.

25870867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2351908.

The product of its (nonzero) digits is 188160, while the sum is 43.

The square root of 25870867 is about 5086.3412193835. The cubic root of 25870867 is about 295.7583362007.

The spelling of 25870867 in words is "twenty-five million, eight hundred seventy thousand, eight hundred sixty-seven".