37472521 has 4 divisors (see below), whose sum is σ = 38681344. Its totient is φ = 36263700.

The previous prime is 37472509. The next prime is 37472531. The reversal of 37472521 is 12527473.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 37472521 - 2¹⁷ = 37341449 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 1208791 = 37472521 / (3 + 7 + 4 + 7 + 2 + 5 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (37472531) 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, 604365 + ... + 604426.

It is an arithmetic number, because the mean of its divisors is an integer number (9670336).

Almost surely, 2^37472521 is an apocalyptic number.

37472521 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

37472521 is a deficient number, since it is larger than the sum of its proper divisors (1208823).

37472521 is a wasteful number, since it uses less digits than its factorization.

37472521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1208822.

The product of its digits is 11760, while the sum is 31.

The square root of 37472521 is about 6121.4802948307. The cubic root of 37472521 is about 334.6346979608.

Adding to 37472521 its reverse (12527473), we get a palindrome (49999994).

The spelling of 37472521 in words is "thirty-seven million, four hundred seventy-two thousand, five hundred twenty-one".