25361537 has 2 divisors, whose sum is σ = 25361538. Its totient is φ = 25361536.

The previous prime is 25361533. The next prime is 25361579. The reversal of 25361537 is 73516352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23078416 + 2283121 = 4804^2 + 1511^2 .

It is a cyclic number.

It is not a de Polignac number, because 25361537 - 2² = 25361533 is a prime.

It is not a weakly prime, because it can be changed into another prime (25361533) 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, 12680768 + 12680769.

It is an arithmetic number, because the mean of its divisors is an integer number (12680769).

Almost surely, 2^25361537 is an apocalyptic number.

It is an amenable number.

25361537 is a deficient number, since it is larger than the sum of its proper divisors (1).

25361537 is an equidigital number, since it uses as much as digits as its factorization.

25361537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18900, while the sum is 32.

The square root of 25361537 is about 5036.0239276636. The cubic root of 25361537 is about 293.8045541050.

Adding to 25361537 its reverse (73516352), we get a palindrome (98877889).

The spelling of 25361537 in words is "twenty-five million, three hundred sixty-one thousand, five hundred thirty-seven".