42802457 has 2 divisors, whose sum is σ = 42802458. Its totient is φ = 42802456.

The previous prime is 42802453. The next prime is 42802469. The reversal of 42802457 is 75420824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36228361 + 6574096 = 6019^2 + 2564^2 .

It is a cyclic number.

It is not a de Polignac number, because 42802457 - 2² = 42802453 is a prime.

It is not a weakly prime, because it can be changed into another prime (42802453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21401228 + 21401229.

It is an arithmetic number, because the mean of its divisors is an integer number (21401229).

Almost surely, 2^42802457 is an apocalyptic number.

It is an amenable number.

42802457 is a deficient number, since it is larger than the sum of its proper divisors (1).

42802457 is an equidigital number, since it uses as much as digits as its factorization.

42802457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 42802457 is about 6542.3586725278. The cubic root of 42802457 is about 349.8024926479.

The spelling of 42802457 in words is "forty-two million, eight hundred two thousand, four hundred fifty-seven".