42537091 has 4 divisors (see below), whose sum is σ = 42555232. Its totient is φ = 42518952.

The previous prime is 42537083. The next prime is 42537107. The reversal of 42537091 is 19073524.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42537091 - 2³ = 42537083 is a prime.

It is a super-3 number, since 3×42537091³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42537041) 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, 4920 + ... + 10453.

It is an arithmetic number, because the mean of its divisors is an integer number (10638808).

Almost surely, 2^42537091 is an apocalyptic number.

42537091 is a deficient number, since it is larger than the sum of its proper divisors (18141).

42537091 is a wasteful number, since it uses less digits than its factorization.

42537091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18140.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 42537091 is about 6522.0465346393. The cubic root of 42537091 is about 349.0780935413.

The spelling of 42537091 in words is "forty-two million, five hundred thirty-seven thousand, ninety-one".