42630457 has 4 divisors (see below), whose sum is σ = 43537536. Its totient is φ = 41723380.

The previous prime is 42630451. The next prime is 42630463. The reversal of 42630457 is 75403624.

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 an interprime number because it is at equal distance from previous prime (42630451) and next prime (42630463).

It is a cyclic number.

It is not a de Polignac number, because 42630457 - 2³ = 42630449 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42630451) 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, 453469 + ... + 453562.

It is an arithmetic number, because the mean of its divisors is an integer number (10884384).

Almost surely, 2^42630457 is an apocalyptic number.

42630457 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

It is an amenable number.

42630457 is a deficient number, since it is larger than the sum of its proper divisors (907079).

42630457 is an equidigital number, since it uses as much as digits as its factorization.

42630457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907078.

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 42630457 is about 6529.2003338847. The cubic root of 42630457 is about 349.3333077383. Note that the first 4 decimals are identical.

The spelling of 42630457 in words is "forty-two million, six hundred thirty thousand, four hundred fifty-seven".