42606731 has 4 divisors (see below), whose sum is σ = 43305264. Its totient is φ = 41908200.

The previous prime is 42606719. The next prime is 42606737. The reversal of 42606731 is 13760624.

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 42606731 - 2¹⁴ = 42590347 is a prime.

It is a super-2 number, since 2×42606731² = 3630667053012722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42606694 and 42606703.

It is not an unprimeable number, because it can be changed into a prime (42606737) 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, 349175 + ... + 349296.

It is an arithmetic number, because the mean of its divisors is an integer number (10826316).

Almost surely, 2^42606731 is an apocalyptic number.

42606731 is a deficient number, since it is larger than the sum of its proper divisors (698533).

42606731 is an equidigital number, since it uses as much as digits as its factorization.

42606731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698532.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 42606731 is about 6527.3831663232. The cubic root of 42606731 is about 349.2684885086.

The spelling of 42606731 in words is "forty-two million, six hundred six thousand, seven hundred thirty-one".