8420537 has 4 divisors (see below), whose sum is σ = 8435856. Its totient is φ = 8405220.

The previous prime is 8420521. The next prime is 8420543. The reversal of 8420537 is 7350248.

It is a happy number.

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 8420537 - 2⁴ = 8420521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8420597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6803 + ... + 7944.

It is an arithmetic number, because the mean of its divisors is an integer number (2108964).

Almost surely, 2^8420537 is an apocalyptic number.

It is an amenable number.

8420537 is a deficient number, since it is larger than the sum of its proper divisors (15319).

8420537 is a wasteful number, since it uses less digits than its factorization.

8420537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15318.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 8420537 is about 2901.8161554447. The cubic root of 8420537 is about 203.4448010755. Note that the first 3 decimals are identical.

The spelling of 8420537 in words is "eight million, four hundred twenty thousand, five hundred thirty-seven".