630621042 has 8 divisors (see below), whose sum is σ = 1261242096. Its totient is φ = 210207012.

The previous prime is 630621011. The next prime is 630621049. The reversal of 630621042 is 240126036.

It is a sphenic number, since it is the product of 3 distinct primes.

630621042 is an admirable number.

It is a super-2 number, since 2×630621042² = 795365797226331528, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (630621049) 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, 52551748 + ... + 52551759.

It is an arithmetic number, because the mean of its divisors is an integer number (157655262).

Almost surely, 2^630621042 is an apocalyptic number.

630621042 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

630621042 is a wasteful number, since it uses less digits than its factorization.

630621042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105103512.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 630621042 is about 25112.1692014051. The cubic root of 630621042 is about 857.5434865337.

Adding to 630621042 its reverse (240126036), we get a palindrome (870747078).

The spelling of 630621042 in words is "six hundred thirty million, six hundred twenty-one thousand, forty-two".