42900123 has 8 divisors (see below), whose sum is σ = 65371648. Its totient is φ = 24514344.

The previous prime is 42900107. The next prime is 42900149. The reversal of 42900123 is 32100924.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42900123 - 2⁴ = 42900107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 2042863 = 42900123 / (4 + 2 + 9 + 0 + 0 + 1 + 2 + 3).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42900123.

It is not an unprimeable number, because it can be changed into a prime (42900103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1021411 + ... + 1021452.

It is an arithmetic number, because the mean of its divisors is an integer number (8171456).

Almost surely, 2^42900123 is an apocalyptic number.

42900123 is a deficient number, since it is larger than the sum of its proper divisors (22471525).

42900123 is a wasteful number, since it uses less digits than its factorization.

42900123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2042873.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 42900123 is about 6549.8185471050. The cubic root of 42900123 is about 350.0683485567.

The spelling of 42900123 in words is "forty-two million, nine hundred thousand, one hundred twenty-three".