25401643 has 8 divisors (see below), whose sum is σ = 25894400. Its totient is φ = 24912360.

The previous prime is 25401631. The next prime is 25401653. The reversal of 25401643 is 34610452.

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 25401643 - 2⁵ = 25401611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25401653) 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, 17458 + ... + 18856.

It is an arithmetic number, because the mean of its divisors is an integer number (3236800).

Almost surely, 2^25401643 is an apocalyptic number.

25401643 is a deficient number, since it is larger than the sum of its proper divisors (492757).

25401643 is a wasteful number, since it uses less digits than its factorization.

25401643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1737.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 25401643 is about 5040.0042658712. The cubic root of 25401643 is about 293.9593438775.

The spelling of 25401643 in words is "twenty-five million, four hundred one thousand, six hundred forty-three".