37125521 has 4 divisors (see below), whose sum is σ = 37285092. Its totient is φ = 36965952.

The previous prime is 37125511. The next prime is 37125527. The reversal of 37125521 is 12552173.

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 16974400 + 20151121 = 4120^2 + 4489^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-37125521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (37125527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79436 + ... + 79901.

It is an arithmetic number, because the mean of its divisors is an integer number (9321273).

Almost surely, 2^37125521 is an apocalyptic number.

It is an amenable number.

37125521 is a deficient number, since it is larger than the sum of its proper divisors (159571).

37125521 is a wasteful number, since it uses less digits than its factorization.

37125521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159570.

The product of its digits is 2100, while the sum is 26.

The square root of 37125521 is about 6093.0715571048. The cubic root of 37125521 is about 333.5985741082.

Adding to 37125521 its reverse (12552173), we get a palindrome (49677694).

The spelling of 37125521 in words is "thirty-seven million, one hundred twenty-five thousand, five hundred twenty-one".