25401001 has 2 divisors, whose sum is σ = 25401002. Its totient is φ = 25401000.

The previous prime is 25400989. The next prime is 25401011. The reversal of 25401001 is 10010452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23775376 + 1625625 = 4876^2 + 1275^2 .

It is a cyclic number.

It is not a de Polignac number, because 25401001 - 2⁹ = 25400489 is a prime.

It is not a weakly prime, because it can be changed into another prime (25401011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12700500 + 12700501.

It is an arithmetic number, because the mean of its divisors is an integer number (12700501).

Almost surely, 2^25401001 is an apocalyptic number.

It is an amenable number.

25401001 is a deficient number, since it is larger than the sum of its proper divisors (1).

25401001 is an equidigital number, since it uses as much as digits as its factorization.

25401001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 25401001 is about 5039.9405750465. The cubic root of 25401001 is about 293.9568673515.

Adding to 25401001 its reverse (10010452), we get a palindrome (35411453).

The spelling of 25401001 in words is "twenty-five million, four hundred one thousand, one".