25571401 has 2 divisors, whose sum is σ = 25571402. Its totient is φ = 25571400.

The previous prime is 25571363. The next prime is 25571407. The reversal of 25571401 is 10417552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19811401 + 5760000 = 4451^2 + 2400^2 .

It is a cyclic number.

It is not a de Polignac number, because 25571401 - 2²³ = 17182793 is a prime.

It is not a weakly prime, because it can be changed into another prime (25571407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12785700 + 12785701.

It is an arithmetic number, because the mean of its divisors is an integer number (12785701).

Almost surely, 2^25571401 is an apocalyptic number.

It is an amenable number.

25571401 is a deficient number, since it is larger than the sum of its proper divisors (1).

25571401 is an equidigital number, since it uses as much as digits as its factorization.

25571401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 25571401 is about 5056.8172796731. The cubic root of 25571401 is about 294.6127293961.

Adding to 25571401 its reverse (10417552), we get a palindrome (35988953).

The spelling of 25571401 in words is "twenty-five million, five hundred seventy-one thousand, four hundred one".