42757513 has 4 divisors (see below), whose sum is σ = 44231940. Its totient is φ = 41283088.

The previous prime is 42757489. The next prime is 42757531. The reversal of 42757513 is 31575724.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8277129 + 34480384 = 2877^2 + 5872^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42757513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42757553) 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, 737170 + ... + 737227.

It is an arithmetic number, because the mean of its divisors is an integer number (11057985).

Almost surely, 2^42757513 is an apocalyptic number.

It is an amenable number.

42757513 is a deficient number, since it is larger than the sum of its proper divisors (1474427).

42757513 is a wasteful number, since it uses less digits than its factorization.

42757513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1474426.

The product of its digits is 29400, while the sum is 34.

The square root of 42757513 is about 6538.9229235402. The cubic root of 42757513 is about 349.6800150282.

The spelling of 42757513 in words is "forty-two million, seven hundred fifty-seven thousand, five hundred thirteen".