42770731 has 16 divisors (see below), whose sum is σ = 46448640. Its totient is φ = 39267360.

The previous prime is 42770719. The next prime is 42770743. The reversal of 42770731 is 13707724.

It is an interprime number because it is at equal distance from previous prime (42770719) and next prime (42770743).

It is a cyclic number.

It is not a de Polignac number, because 42770731 - 2⁷ = 42770603 is a prime.

It is a super-2 number, since 2×42770731² = 3658670860548722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42770693 and 42770702.

It is not an unprimeable number, because it can be changed into a prime (42770701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158865 + ... + 159133.

It is an arithmetic number, because the mean of its divisors is an integer number (2903040).

Almost surely, 2^42770731 is an apocalyptic number.

42770731 is a deficient number, since it is larger than the sum of its proper divisors (3677909).

42770731 is a wasteful number, since it uses less digits than its factorization.

42770731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546.

The product of its (nonzero) digits is 8232, while the sum is 31.

The square root of 42770731 is about 6539.9335623537. The cubic root of 42770731 is about 349.7160445188.

The spelling of 42770731 in words is "forty-two million, seven hundred seventy thousand, seven hundred thirty-one".