37072421 has 2 divisors, whose sum is σ = 37072422. Its totient is φ = 37072420.

The previous prime is 37072417. The next prime is 37072429. The reversal of 37072421 is 12427073.

37072421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24611521 + 12460900 = 4961^2 + 3530^2 .

It is an emirp because it is prime and its reverse (12427073) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 37072421 - 2² = 37072417 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37072429) 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 as a sum of consecutive naturals, namely, 18536210 + 18536211.

It is an arithmetic number, because the mean of its divisors is an integer number (18536211).

Almost surely, 2^37072421 is an apocalyptic number.

It is an amenable number.

37072421 is a deficient number, since it is larger than the sum of its proper divisors (1).

37072421 is an equidigital number, since it uses as much as digits as its factorization.

37072421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 37072421 is about 6088.7125897024. The cubic root of 37072421 is about 333.4394514355.

Adding to 37072421 its reverse (12427073), we get a palindrome (49499494).

The spelling of 37072421 in words is "thirty-seven million, seventy-two thousand, four hundred twenty-one".