420324157 has 4 divisors (see below), whose sum is σ = 458535456. Its totient is φ = 382112860.

The previous prime is 420324139. The next prime is 420324187. The reversal of 420324157 is 751423024.

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-420324157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420324187) 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, 19105633 + ... + 19105654.

It is an arithmetic number, because the mean of its divisors is an integer number (114633864).

Almost surely, 2^420324157 is an apocalyptic number.

It is an amenable number.

420324157 is a deficient number, since it is larger than the sum of its proper divisors (38211299).

420324157 is a wasteful number, since it uses less digits than its factorization.

420324157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38211298.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 420324157 is about 20501.8086275333. The cubic root of 420324157 is about 749.0798534948.

The spelling of 420324157 in words is "four hundred twenty million, three hundred twenty-four thousand, one hundred fifty-seven".