25450643 has 2 divisors, whose sum is σ = 25450644. Its totient is φ = 25450642.

The previous prime is 25450631. The next prime is 25450669. The reversal of 25450643 is 34605452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25450643 - 2⁸ = 25450387 is a prime.

It is a super-2 number, since 2×25450643² = 1295470458226898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25450693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12725321 + 12725322.

It is an arithmetic number, because the mean of its divisors is an integer number (12725322).

Almost surely, 2^25450643 is an apocalyptic number.

25450643 is a deficient number, since it is larger than the sum of its proper divisors (1).

25450643 is an equidigital number, since it uses as much as digits as its factorization.

25450643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 25450643 is about 5044.8630308463. The cubic root of 25450643 is about 294.1482392171.

The spelling of 25450643 in words is "twenty-five million, four hundred fifty thousand, six hundred forty-three".