42501757 has 2 divisors, whose sum is σ = 42501758. Its totient is φ = 42501756.

The previous prime is 42501749. The next prime is 42501773. The reversal of 42501757 is 75710524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37810201 + 4691556 = 6149^2 + 2166^2 .

It is a cyclic number.

It is not a de Polignac number, because 42501757 - 2³ = 42501749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42501737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21250878 + 21250879.

It is an arithmetic number, because the mean of its divisors is an integer number (21250879).

Almost surely, 2^42501757 is an apocalyptic number.

It is an amenable number.

42501757 is a deficient number, since it is larger than the sum of its proper divisors (1).

42501757 is an equidigital number, since it uses as much as digits as its factorization.

42501757 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9800, while the sum is 31.

The square root of 42501757 is about 6519.3371595585. The cubic root of 42501757 is about 348.9814113136.

The spelling of 42501757 in words is "forty-two million, five hundred one thousand, seven hundred fifty-seven".