42120126 has 12 divisors (see below), whose sum is σ = 91260312. Its totient is φ = 14040036.

The previous prime is 42120119. The next prime is 42120157. The reversal of 42120126 is 62102124.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 2340007 = 42120126 / (4 + 2 + 1 + 2 + 0 + 1 + 2 + 6).

It is a junction number, because it is equal to n+sod(n) for n = 42120099 and 42120108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1169986 + ... + 1170021.

It is an arithmetic number, because the mean of its divisors is an integer number (7605026).

Almost surely, 2^42120126 is an apocalyptic number.

42120126 is an abundant number, since it is smaller than the sum of its proper divisors (49140186).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42120126 is a wasteful number, since it uses less digits than its factorization.

42120126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2340015 (or 2340012 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 42120126 is about 6490.0020030814. The cubic root of 42120126 is about 347.9337468007.

The spelling of 42120126 in words is "forty-two million, one hundred twenty thousand, one hundred twenty-six".