406020531 has 16 divisors (see below), whose sum is σ = 624377600. Its totient is φ = 229881888.

The previous prime is 406020493. The next prime is 406020539. The reversal of 406020531 is 135020604.

It is a happy number.

It is not a de Polignac number, because 406020531 - 2¹⁰ = 406019507 is a prime.

It is a super-2 number, since 2×406020531² = 329705343187043922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 406020498 and 406020507.

It is not an unprimeable number, because it can be changed into a prime (406020539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86401 + ... + 90978.

It is an arithmetic number, because the mean of its divisors is an integer number (39023600).

Almost surely, 2^406020531 is an apocalyptic number.

406020531 is a deficient number, since it is larger than the sum of its proper divisors (218357069).

406020531 is a wasteful number, since it uses less digits than its factorization.

406020531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177498.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 406020531 is about 20149.9511413800. The cubic root of 406020531 is about 740.4845444772.

The spelling of 406020531 in words is "four hundred six million, twenty thousand, five hundred thirty-one".