421270537 has 2 divisors, whose sum is σ = 421270538. Its totient is φ = 421270536.

The previous prime is 421270511. The next prime is 421270579. The reversal of 421270537 is 735072124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 398840841 + 22429696 = 19971^2 + 4736^2 .

It is a cyclic number.

It is not a de Polignac number, because 421270537 - 2¹⁵ = 421237769 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 421270499 and 421270508.

It is not a weakly prime, because it can be changed into another prime (421270237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210635268 + 210635269.

It is an arithmetic number, because the mean of its divisors is an integer number (210635269).

Almost surely, 2^421270537 is an apocalyptic number.

It is an amenable number.

421270537 is a deficient number, since it is larger than the sum of its proper divisors (1).

421270537 is an equidigital number, since it uses as much as digits as its factorization.

421270537 is an evil number, because the sum of its binary digits is even.

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

The square root of 421270537 is about 20524.8760532189. The cubic root of 421270537 is about 749.6416284908.

The spelling of 421270537 in words is "four hundred twenty-one million, two hundred seventy thousand, five hundred thirty-seven".