406157 has 4 divisors (see below), whose sum is σ = 423840. Its totient is φ = 388476.

The previous prime is 406123. The next prime is 406169. The reversal of 406157 is 751604.

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 406157 - 2⁶ = 406093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 17659 = 406157 / (4 + 0 + 6 + 1 + 5 + 7).

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 406157.

It is not an unprimeable number, because it can be changed into a prime (406117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8807 + ... + 8852.

It is an arithmetic number, because the mean of its divisors is an integer number (105960).

2⁴⁰⁶¹⁵⁷ is an apocalyptic number.

It is an amenable number.

406157 is a deficient number, since it is larger than the sum of its proper divisors (17683).

406157 is a wasteful number, since it uses less digits than its factorization.

406157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17682.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 406157 is about 637.3044798211. The cubic root of 406157 is about 74.0567497479.

The spelling of 406157 in words is "four hundred six thousand, one hundred fifty-seven".