42102479 has 4 divisors (see below), whose sum is σ = 42278880. Its totient is φ = 41926080.

The previous prime is 42102469. The next prime is 42102481. The reversal of 42102479 is 97420124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42102479 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 (42102409) 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, 87842 + ... + 88319.

It is an arithmetic number, because the mean of its divisors is an integer number (10569720).

Almost surely, 2^42102479 is an apocalyptic number.

42102479 is a deficient number, since it is larger than the sum of its proper divisors (176401).

42102479 is a wasteful number, since it uses less digits than its factorization.

42102479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176400.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 42102479 is about 6488.6423079100. The cubic root of 42102479 is about 347.8851489363.

The spelling of 42102479 in words is "forty-two million, one hundred two thousand, four hundred seventy-nine".