42630281 has 4 divisors (see below), whose sum is σ = 44874000. Its totient is φ = 40386564.

The previous prime is 42630233. The next prime is 42630307. The reversal of 42630281 is 18203624.

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 42630281 - 2²² = 38435977 is a prime.

It is a super-2 number, since 2×42630281² = 3634681716277922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42630281.

It is not an unprimeable number, because it can be changed into a prime (42630221) 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, 1121831 + ... + 1121868.

It is an arithmetic number, because the mean of its divisors is an integer number (11218500).

Almost surely, 2^42630281 is an apocalyptic number.

It is an amenable number.

42630281 is a deficient number, since it is larger than the sum of its proper divisors (2243719).

42630281 is a wasteful number, since it uses less digits than its factorization.

42630281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2243718.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 42630281 is about 6529.1868559569. The cubic root of 42630281 is about 349.3328269964.

The spelling of 42630281 in words is "forty-two million, six hundred thirty thousand, two hundred eighty-one".