42996591 has 36 divisors (see below), whose sum is σ = 70912296. Its totient is φ = 24895200.

The previous prime is 42996581. The next prime is 42996599. The reversal of 42996591 is 19569924.

It is not a de Polignac number, because 42996591 - 2⁷ = 42996463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42996599) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 51961 + ... + 52781.

It is an arithmetic number, because the mean of its divisors is an integer number (1969786).

Almost surely, 2^42996591 is an apocalyptic number.

42996591 is a deficient number, since it is larger than the sum of its proper divisors (27915705).

42996591 is a wasteful number, since it uses less digits than its factorization.

42996591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884 (or 858 counting only the distinct ones).

The product of its digits is 174960, while the sum is 45.

The square root of 42996591 is about 6557.1785853368. The cubic root of 42996591 is about 350.3305475894.

It can be divided in two parts, 429 and 96591, that added together give a triangular number (97020 = T₄₄₀).

The spelling of 42996591 in words is "forty-two million, nine hundred ninety-six thousand, five hundred ninety-one".