420762551 has 4 divisors (see below), whose sum is σ = 459013704. Its totient is φ = 382511400.

The previous prime is 420762547. The next prime is 420762569. The reversal of 420762551 is 155267024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 420762551 - 2² = 420762547 is a prime.

It is a super-2 number, since 2×420762551² = 354082248648055202, 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 (420762521) 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, 19125560 + ... + 19125581.

It is an arithmetic number, because the mean of its divisors is an integer number (114753426).

Almost surely, 2^420762551 is an apocalyptic number.

420762551 is a deficient number, since it is larger than the sum of its proper divisors (38251153).

420762551 is a wasteful number, since it uses less digits than its factorization.

420762551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38251152.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 420762551 is about 20512.4974344910. The cubic root of 420762551 is about 749.3401906687.

The spelling of 420762551 in words is "four hundred twenty million, seven hundred sixty-two thousand, five hundred fifty-one".