42919451 has 4 divisors (see below), whose sum is σ = 42938112. Its totient is φ = 42900792.

The previous prime is 42919439. The next prime is 42919477. The reversal of 42919451 is 15491924.

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

It is a cyclic number.

It is not a de Polignac number, because 42919451 - 2¹⁰ = 42918427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42919421) 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, 5300 + ... + 10673.

It is an arithmetic number, because the mean of its divisors is an integer number (10734528).

Almost surely, 2^42919451 is an apocalyptic number.

42919451 is a deficient number, since it is larger than the sum of its proper divisors (18661).

42919451 is a wasteful number, since it uses less digits than its factorization.

42919451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18660.

The product of its digits is 12960, while the sum is 35.

The square root of 42919451 is about 6551.2938416774. The cubic root of 42919451 is about 350.1209133257.

The spelling of 42919451 in words is "forty-two million, nine hundred nineteen thousand, four hundred fifty-one".