25161401 has 2 divisors, whose sum is σ = 25161402. Its totient is φ = 25161400.

The previous prime is 25161373. The next prime is 25161439. The reversal of 25161401 is 10416152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14592400 + 10569001 = 3820^2 + 3251^2 .

It is a cyclic number.

It is not a de Polignac number, because 25161401 - 2⁶ = 25161337 is a prime.

It is a super-2 number, since 2×25161401² = 1266192200565602, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25161001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12580700 + 12580701.

It is an arithmetic number, because the mean of its divisors is an integer number (12580701).

Almost surely, 2^25161401 is an apocalyptic number.

It is an amenable number.

25161401 is a deficient number, since it is larger than the sum of its proper divisors (1).

25161401 is an equidigital number, since it uses as much as digits as its factorization.

25161401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 25161401 is about 5016.1141334703. The cubic root of 25161401 is about 293.0296770136.

Adding to 25161401 its reverse (10416152), we get a palindrome (35577553).

The spelling of 25161401 in words is "twenty-five million, one hundred sixty-one thousand, four hundred one".