25717429 has 2 divisors, whose sum is σ = 25717430. Its totient is φ = 25717428.

The previous prime is 25717421. The next prime is 25717453. The reversal of 25717429 is 92471752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21808900 + 3908529 = 4670^2 + 1977^2 .

It is a cyclic number.

It is not a de Polignac number, because 25717429 - 2³ = 25717421 is a prime.

It is a super-2 number, since 2×25717429² = 1322772308740082, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25717421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12858714 + 12858715.

It is an arithmetic number, because the mean of its divisors is an integer number (12858715).

Almost surely, 2^25717429 is an apocalyptic number.

It is an amenable number.

25717429 is a deficient number, since it is larger than the sum of its proper divisors (1).

25717429 is an equidigital number, since it uses as much as digits as its factorization.

25717429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 37.

The square root of 25717429 is about 5071.2354510514. The cubic root of 25717429 is about 295.1724702468.

It can be divided in two parts, 2571 and 7429, that added together give a 4-th power (10000 = 10⁴).

The spelling of 25717429 in words is "twenty-five million, seven hundred seventeen thousand, four hundred twenty-nine".