25464021 has 8 divisors (see below), whose sum is σ = 37038624. Its totient is φ = 15432720.

The previous prime is 25464017. The next prime is 25464031. The reversal of 25464021 is 12046452.

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

It is not a de Polignac number, because 25464021 - 2² = 25464017 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25463982 and 25464000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25464031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 385786 + ... + 385851.

It is an arithmetic number, because the mean of its divisors is an integer number (4629828).

Almost surely, 2^25464021 is an apocalyptic number.

It is an amenable number.

25464021 is a deficient number, since it is larger than the sum of its proper divisors (11574603).

25464021 is a wasteful number, since it uses less digits than its factorization.

25464021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771651.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 25464021 is about 5046.1887598464. The cubic root of 25464021 is about 294.1997693606.

Subtracting from 25464021 its reverse (12046452), we obtain a square (13417569 = 3663²).

The spelling of 25464021 in words is "twenty-five million, four hundred sixty-four thousand, twenty-one".