42684013 has 4 divisors (see below), whose sum is σ = 44930560. Its totient is φ = 40437468.

The previous prime is 42684011. The next prime is 42684017. The reversal of 42684013 is 31048624.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42684013 - 2¹ = 42684011 is a prime.

It is a super-3 number, since 3×42684013³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42684011) 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, 1123245 + ... + 1123282.

It is an arithmetic number, because the mean of its divisors is an integer number (11232640).

Almost surely, 2^42684013 is an apocalyptic number.

It is an amenable number.

42684013 is a deficient number, since it is larger than the sum of its proper divisors (2246547).

42684013 is a wasteful number, since it uses less digits than its factorization.

42684013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2246546.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 42684013 is about 6533.3003145424. The cubic root of 42684013 is about 349.4795339096.

It can be divided in two parts, 4268 and 4013, that added together give a square (8281 = 91²).

The spelling of 42684013 in words is "forty-two million, six hundred eighty-four thousand, thirteen".