42945715 has 16 divisors (see below), whose sum is σ = 55234368. Its totient is φ = 31971456.

The previous prime is 42945709. The next prime is 42945731. The reversal of 42945715 is 51754924.

It is a cyclic number.

It is not a de Polignac number, because 42945715 - 2¹³ = 42937523 is a prime.

It is a super-2 number, since 2×42945715² = 3688668873722450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 792 + ... + 9301.

It is an arithmetic number, because the mean of its divisors is an integer number (3452148).

Almost surely, 2^42945715 is an apocalyptic number.

42945715 is a deficient number, since it is larger than the sum of its proper divisors (12288653).

42945715 is a wasteful number, since it uses less digits than its factorization.

42945715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10158.

The product of its digits is 50400, while the sum is 37.

The square root of 42945715 is about 6553.2980246590. The cubic root of 42945715 is about 350.1923160766.

It can be divided in two parts, 42945 and 715, that added together give a triangular number (43660 = T₂₉₅).

The spelling of 42945715 in words is "forty-two million, nine hundred forty-five thousand, seven hundred fifteen".