42515829 has 6 divisors (see below), whose sum is σ = 61411766. Its totient is φ = 28343880.

The previous prime is 42515819. The next prime is 42515843. The reversal of 42515829 is 92851524.

It can be written as a sum of positive squares in only one way, i.e., 38415204 + 4100625 = 6198^2 + 2025^2 .

It is not a de Polignac number, because 42515829 - 2⁵ = 42515797 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42515793 and 42515802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42515819) 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, 2361982 + ... + 2361999.

Almost surely, 2^42515829 is an apocalyptic number.

It is an amenable number.

42515829 is a deficient number, since it is larger than the sum of its proper divisors (18895937).

42515829 is a wasteful number, since it uses less digits than its factorization.

42515829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4723987 (or 4723984 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 42515829 is about 6520.4163210642. The cubic root of 42515829 is about 349.0199220708.

The spelling of 42515829 in words is "forty-two million, five hundred fifteen thousand, eight hundred twenty-nine".