42612691 has 24 divisors (see below), whose sum is σ = 49029120. Its totient is φ = 36978480.

The previous prime is 42612677. The next prime is 42612707. The reversal of 42612691 is 19621624.

It is not a de Polignac number, because 42612691 - 2⁹ = 42612179 is a prime.

It is a super-2 number, since 2×42612691² = 3631682868522962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42652691) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 335470 + ... + 335596.

It is an arithmetic number, because the mean of its divisors is an integer number (2042880).

Almost surely, 2^42612691 is an apocalyptic number.

42612691 is a deficient number, since it is larger than the sum of its proper divisors (6416429).

42612691 is a wasteful number, since it uses less digits than its factorization.

42612691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255 (or 244 counting only the distinct ones).

The product of its digits is 5184, while the sum is 31.

The square root of 42612691 is about 6527.8396885953. The cubic root of 42612691 is about 349.2847734405.

The spelling of 42612691 in words is "forty-two million, six hundred twelve thousand, six hundred ninety-one".