42069731 has 8 divisors (see below), whose sum is σ = 47014128. Its totient is φ = 37312000.

The previous prime is 42069721. The next prime is 42069739. The reversal of 42069731 is 13796024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42069731 - 2¹⁸ = 41807587 is a prime.

It is a super-2 number, since 2×42069731² = 3539724532824722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42069739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46190 + ... + 47091.

It is an arithmetic number, because the mean of its divisors is an integer number (5876766).

Almost surely, 2^42069731 is an apocalyptic number.

42069731 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

42069731 is a deficient number, since it is larger than the sum of its proper divisors (4944397).

42069731 is a wasteful number, since it uses less digits than its factorization.

42069731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93333.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 42069731 is about 6486.1183307121. The cubic root of 42069731 is about 347.7949286122.

The spelling of 42069731 in words is "forty-two million, sixty-nine thousand, seven hundred thirty-one".