42101442 has 12 divisors (see below), whose sum is σ = 91219830. Its totient is φ = 14033808.

The previous prime is 42101419. The next prime is 42101467. The reversal of 42101442 is 24410124.

It can be written as a sum of positive squares in only one way, i.e., 40335201 + 1766241 = 6351^2 + 1329^2 .

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: 2338969 = 42101442 / (4 + 2 + 1 + 0 + 1 + 4 + 4 + 2).

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, 1169467 + ... + 1169502.

Almost surely, 2^42101442 is an apocalyptic number.

42101442 is an abundant number, since it is smaller than the sum of its proper divisors (49118388).

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

42101442 is a wasteful number, since it uses less digits than its factorization.

42101442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2338977 (or 2338974 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 42101442 is about 6488.5623985595. The cubic root of 42101442 is about 347.8822927319.

Adding to 42101442 its reverse (24410124), we get a palindrome (66511566).

The spelling of 42101442 in words is "forty-two million, one hundred one thousand, four hundred forty-two".