75421237 has 2 divisors, whose sum is σ = 75421238. Its totient is φ = 75421236.

The previous prime is 75421223. The next prime is 75421249. The reversal of 75421237 is 73212457.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71757841 + 3663396 = 8471^2 + 1914^2 .

It is a cyclic number.

It is not a de Polignac number, because 75421237 - 2¹⁹ = 74896949 is a prime.

It is a super-2 number, since 2×75421237² = 11376725981220338, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 75421199 and 75421208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75421637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37710618 + 37710619.

It is an arithmetic number, because the mean of its divisors is an integer number (37710619).

Almost surely, 2^75421237 is an apocalyptic number.

It is an amenable number.

75421237 is a deficient number, since it is larger than the sum of its proper divisors (1).

75421237 is an equidigital number, since it uses as much as digits as its factorization.

75421237 is an evil number, because the sum of its binary digits is even.

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

The square root of 75421237 is about 8684.5401144793. The cubic root of 75421237 is about 422.5043814538.

The spelling of 75421237 in words is "seventy-five million, four hundred twenty-one thousand, two hundred thirty-seven".