42407513 has 6 divisors (see below), whose sum is σ = 43586046. Its totient is φ = 41260032.

The previous prime is 42407509. The next prime is 42407531. The reversal of 42407513 is 31570424.

It can be written as a sum of positive squares in 3 ways, for example, as 37797904 + 4609609 = 6148^2 + 2147^2 .

It is not a de Polignac number, because 42407513 - 2² = 42407509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42407543) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14120 + ... + 16857.

It is an arithmetic number, because the mean of its divisors is an integer number (7264341).

Almost surely, 2^42407513 is an apocalyptic number.

It is an amenable number.

42407513 is a deficient number, since it is larger than the sum of its proper divisors (1178533).

42407513 is an equidigital number, since it uses as much as digits as its factorization.

42407513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31051 (or 31014 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 42407513 is about 6512.1051127880. The cubic root of 42407513 is about 348.7232749741.

Adding to 42407513 its reverse (31570424), we get a palindrome (73977937).

The spelling of 42407513 in words is "forty-two million, four hundred seven thousand, five hundred thirteen".