420142757 has 4 divisors (see below), whose sum is σ = 420220416. Its totient is φ = 420065100.

The previous prime is 420142753. The next prime is 420142759. The reversal of 420142757 is 757241024.

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 420142757 - 2² = 420142753 is a prime.

It is a super-2 number, since 2×420142757² = 353039872519122098, 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 (420142753) 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, 30053 + ... + 41754.

It is an arithmetic number, because the mean of its divisors is an integer number (105055104).

Almost surely, 2^420142757 is an apocalyptic number.

It is an amenable number.

420142757 is a deficient number, since it is larger than the sum of its proper divisors (77659).

420142757 is an equidigital number, since it uses as much as digits as its factorization.

420142757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77658.

The product of its (nonzero) digits is 15680, while the sum is 32.

The square root of 420142757 is about 20497.3841501788. The cubic root of 420142757 is about 748.9720774402.

The spelling of 420142757 in words is "four hundred twenty million, one hundred forty-two thousand, seven hundred fifty-seven".