42764569 has 2 divisors, whose sum is σ = 42764570. Its totient is φ = 42764568.

The previous prime is 42764551. The next prime is 42764581. The reversal of 42764569 is 96546724.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38291344 + 4473225 = 6188^2 + 2115^2 .

It is a cyclic number.

It is not a de Polignac number, because 42764569 - 2⁷ = 42764441 is a prime.

It is a super-2 number, since 2×42764569² = 3657616723511522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42764539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21382284 + 21382285.

It is an arithmetic number, because the mean of its divisors is an integer number (21382285).

Almost surely, 2^42764569 is an apocalyptic number.

It is an amenable number.

42764569 is a deficient number, since it is larger than the sum of its proper divisors (1).

42764569 is an equidigital number, since it uses as much as digits as its factorization.

42764569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 43.

The square root of 42764569 is about 6539.4624396811. The cubic root of 42764569 is about 349.6992491253.

The spelling of 42764569 in words is "forty-two million, seven hundred sixty-four thousand, five hundred sixty-nine".