25471969 has 2 divisors, whose sum is σ = 25471970. Its totient is φ = 25471968.

The previous prime is 25471961. The next prime is 25471973. The reversal of 25471969 is 96917452.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25000000 + 471969 = 5000^2 + 687^2 .

It is a cyclic number.

It is not a de Polignac number, because 25471969 - 2³ = 25471961 is a prime.

It is a super-2 number, since 2×25471969² = 1297642409473922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25471961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12735984 + 12735985.

It is an arithmetic number, because the mean of its divisors is an integer number (12735985).

Almost surely, 2^25471969 is an apocalyptic number.

It is an amenable number.

25471969 is a deficient number, since it is larger than the sum of its proper divisors (1).

25471969 is an equidigital number, since it uses as much as digits as its factorization.

25471969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 43.

The square root of 25471969 is about 5046.9762234431. The cubic root of 25471969 is about 294.2303753743.

It can be divided in two parts, 25 and 471969, that multiplied together give a square (11799225 = 3435²).

The spelling of 25471969 in words is "twenty-five million, four hundred seventy-one thousand, nine hundred sixty-nine".