42645669 has 8 divisors (see below), whose sum is σ = 62030112. Its totient is φ = 25845840.

The previous prime is 42645661. The next prime is 42645683. The reversal of 42645669 is 96654624.

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

It is not a de Polignac number, because 42645669 - 2³ = 42645661 is a prime.

It is a super-2 number, since 2×42645669² = 3637306168915122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42645669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42645661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 646114 + ... + 646179.

It is an arithmetic number, because the mean of its divisors is an integer number (7753764).

Almost surely, 2^42645669 is an apocalyptic number.

It is an amenable number.

42645669 is a deficient number, since it is larger than the sum of its proper divisors (19384443).

42645669 is a wasteful number, since it uses less digits than its factorization.

42645669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1292307.

The product of its digits is 311040, while the sum is 42.

The square root of 42645669 is about 6530.3651505869. The cubic root of 42645669 is about 349.3748541404.

The spelling of 42645669 in words is "forty-two million, six hundred forty-five thousand, six hundred sixty-nine".