42601665 has 32 divisors (see below), whose sum is σ = 71197056. Its totient is φ = 21731840.

The previous prime is 42601651. The next prime is 42601679. The reversal of 42601665 is 56610624.

It is an interprime number because it is at equal distance from previous prime (42601651) and next prime (42601679).

It is not a de Polignac number, because 42601665 - 2¹⁴ = 42585281 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31942 + ... + 33248.

It is an arithmetic number, because the mean of its divisors is an integer number (2224908).

Almost surely, 2^42601665 is an apocalyptic number.

It is an amenable number.

42601665 is a deficient number, since it is larger than the sum of its proper divisors (28595391).

42601665 is a wasteful number, since it uses less digits than its factorization.

42601665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1409.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 42601665 is about 6526.9950972863. The cubic root of 42601665 is about 349.2546451224.

The spelling of 42601665 in words is "forty-two million, six hundred one thousand, six hundred sixty-five".