406556145 has 16 divisors (see below), whose sum is σ = 722766720. Its totient is φ = 216829872.

The previous prime is 406556089. The next prime is 406556147. The reversal of 406556145 is 541655604.

It is not a de Polignac number, because 406556145 - 2⁶ = 406556081 is a prime.

It is a super-2 number, since 2×406556145² = 330575798074522050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (406556147) 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, 1505629 + ... + 1505898.

It is an arithmetic number, because the mean of its divisors is an integer number (45172920).

Almost surely, 2^406556145 is an apocalyptic number.

406556145 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

406556145 is a deficient number, since it is larger than the sum of its proper divisors (316210575).

406556145 is a wasteful number, since it uses less digits than its factorization.

406556145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3011541 (or 3011535 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 406556145 is about 20163.2374632647. The cubic root of 406556145 is about 740.8100121031.

The spelling of 406556145 in words is "four hundred six million, five hundred fifty-six thousand, one hundred forty-five".