25001491 has 2 divisors, whose sum is σ = 25001492. Its totient is φ = 25001490.

The previous prime is 25001479. The next prime is 25001503. The reversal of 25001491 is 19410052.

It is a balanced prime because it is at equal distance from previous prime (25001479) and next prime (25001503).

It is a cyclic number.

It is not a de Polignac number, because 25001491 - 2¹³ = 24993299 is a prime.

It is not a weakly prime, because it can be changed into another prime (25001401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12500745 + 12500746.

It is an arithmetic number, because the mean of its divisors is an integer number (12500746).

Almost surely, 2^25001491 is an apocalyptic number.

25001491 is a deficient number, since it is larger than the sum of its proper divisors (1).

25001491 is an equidigital number, since it uses as much as digits as its factorization.

25001491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 25001491 is about 5000.1490977770. The cubic root of 25001491 is about 292.4075866530.

The spelling of 25001491 in words is "twenty-five million, one thousand, four hundred ninety-one".