25061537 has 4 divisors (see below), whose sum is σ = 25672836. Its totient is φ = 24450240.

The previous prime is 25061521. The next prime is 25061549. The reversal of 25061537 is 73516052.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14145121 + 10916416 = 3761^2 + 3304^2 .

It is a cyclic number.

It is not a de Polignac number, because 25061537 - 2⁴ = 25061521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25061567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 305588 + ... + 305669.

It is an arithmetic number, because the mean of its divisors is an integer number (6418209).

Almost surely, 2^25061537 is an apocalyptic number.

It is an amenable number.

25061537 is a deficient number, since it is larger than the sum of its proper divisors (611299).

25061537 is an equidigital number, since it uses as much as digits as its factorization.

25061537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611298.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 25061537 is about 5006.1499178510. The cubic root of 25061537 is about 292.6414909485.

Adding to 25061537 its reverse (73516052), we get a palindrome (98577589).

The spelling of 25061537 in words is "twenty-five million, sixty-one thousand, five hundred thirty-seven".