420016157 has 4 divisors (see below), whose sum is σ = 458199456. Its totient is φ = 381832860.

The previous prime is 420016139. The next prime is 420016169. The reversal of 420016157 is 751610024.

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 420016157 - 2⁸ = 420015901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420016357) 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, 19091633 + ... + 19091654.

It is an arithmetic number, because the mean of its divisors is an integer number (114549864).

Almost surely, 2^420016157 is an apocalyptic number.

It is an amenable number.

420016157 is a deficient number, since it is larger than the sum of its proper divisors (38183299).

420016157 is a wasteful number, since it uses less digits than its factorization.

420016157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38183298.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 420016157 is about 20494.2957185652. The cubic root of 420016157 is about 748.8968415917.

The spelling of 420016157 in words is "four hundred twenty million, sixteen thousand, one hundred fifty-seven".