42051599 has 4 divisors (see below), whose sum is σ = 42074136. Its totient is φ = 42029064.

The previous prime is 42051589. The next prime is 42051619. The reversal of 42051599 is 99515024.

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-42051599 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 (42051539) 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, 8189 + ... + 12294.

It is an arithmetic number, because the mean of its divisors is an integer number (10518534).

Almost surely, 2^42051599 is an apocalyptic number.

42051599 is a deficient number, since it is larger than the sum of its proper divisors (22537).

42051599 is a wasteful number, since it uses less digits than its factorization.

42051599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22536.

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 42051599 is about 6484.7204257393. The cubic root of 42051599 is about 347.7449550429.

The spelling of 42051599 in words is "forty-two million, fifty-one thousand, five hundred ninety-nine".