25625401 has 2 divisors, whose sum is σ = 25625402. Its totient is φ = 25625400.

The previous prime is 25625389. The next prime is 25625407. The reversal of 25625401 is 10452652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21114025 + 4511376 = 4595^2 + 2124^2 .

It is a cyclic number.

It is not a de Polignac number, because 25625401 - 2⁹ = 25624889 is a prime.

It is a super-2 number, since 2×25625401² = 1313322352821602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25625407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12812700 + 12812701.

It is an arithmetic number, because the mean of its divisors is an integer number (12812701).

Almost surely, 2^25625401 is an apocalyptic number.

It is an amenable number.

25625401 is a deficient number, since it is larger than the sum of its proper divisors (1).

25625401 is an equidigital number, since it uses as much as digits as its factorization.

25625401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 25625401 is about 5062.1537906310. The cubic root of 25625401 is about 294.8199648401.

The spelling of 25625401 in words is "twenty-five million, six hundred twenty-five thousand, four hundred one".