401682157 has 4 divisors (see below), whose sum is σ = 402161760. Its totient is φ = 401202556.

The previous prime is 401682139. The next prime is 401682167. The reversal of 401682157 is 751286104.

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 a de Polignac number, because none of the positive numbers 2^k-401682157 is a prime.

It is a super-2 number, since 2×401682157² = 322697110504345298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401682107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 238543 + ... + 240220.

It is an arithmetic number, because the mean of its divisors is an integer number (100540440).

Almost surely, 2^401682157 is an apocalyptic number.

It is an amenable number.

401682157 is a deficient number, since it is larger than the sum of its proper divisors (479603).

401682157 is an equidigital number, since it uses as much as digits as its factorization.

401682157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479602.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 401682157 is about 20042.0098044083. The cubic root of 401682157 is about 737.8377084791.

The spelling of 401682157 in words is "four hundred one million, six hundred eighty-two thousand, one hundred fifty-seven".