25021567 has 2 divisors, whose sum is σ = 25021568. Its totient is φ = 25021566.

The previous prime is 25021547. The next prime is 25021597. The reversal of 25021567 is 76512052.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25021567 - 2¹⁹ = 24497279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25021547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12510783 + 12510784.

It is an arithmetic number, because the mean of its divisors is an integer number (12510784).

Almost surely, 2^25021567 is an apocalyptic number.

25021567 is a deficient number, since it is larger than the sum of its proper divisors (1).

25021567 is an equidigital number, since it uses as much as digits as its factorization.

25021567 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 25021567 is about 5002.1562350650. The cubic root of 25021567 is about 292.4858327080.

The spelling of 25021567 in words is "twenty-five million, twenty-one thousand, five hundred sixty-seven".