42487213 has 4 divisors (see below), whose sum is σ = 42707548. Its totient is φ = 42266880.

The previous prime is 42487189. The next prime is 42487229. The reversal of 42487213 is 31278424.

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 14577124 + 27910089 = 3818^2 + 5283^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42487213 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 (42487253) 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, 109878 + ... + 110263.

It is an arithmetic number, because the mean of its divisors is an integer number (10676887).

Almost surely, 2^42487213 is an apocalyptic number.

It is an amenable number.

42487213 is a deficient number, since it is larger than the sum of its proper divisors (220335).

42487213 is a wasteful number, since it uses less digits than its factorization.

42487213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220334.

The product of its digits is 10752, while the sum is 31.

The square root of 42487213 is about 6518.2216132930. The cubic root of 42487213 is about 348.9415999029.

The spelling of 42487213 in words is "forty-two million, four hundred eighty-seven thousand, two hundred thirteen".