42490513 has 8 divisors (see below), whose sum is σ = 45879848. Its totient is φ = 39118464.

The previous prime is 42490507. The next prime is 42490523. The reversal of 42490513 is 31509424.

It can be written as a sum of positive squares in 4 ways, for example, as 603729 + 41886784 = 777^2 + 6472^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42490513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42490523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1045 + ... + 9277.

It is an arithmetic number, because the mean of its divisors is an integer number (5734981).

Almost surely, 2^42490513 is an apocalyptic number.

It is an amenable number.

42490513 is a deficient number, since it is larger than the sum of its proper divisors (3389335).

42490513 is a wasteful number, since it uses less digits than its factorization.

42490513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8643.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 42490513 is about 6518.4747449077. The cubic root of 42490513 is about 348.9506338168.

Adding to 42490513 its reverse (31509424), we get a palindrome (73999937).

The spelling of 42490513 in words is "forty-two million, four hundred ninety thousand, five hundred thirteen".