42055420 has 24 divisors (see below), whose sum is σ = 96345648. Its totient is φ = 15292800.

The previous prime is 42055411. The next prime is 42055451. The reversal of 42055420 is 2455024.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 42055391 and 42055400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95361 + ... + 95800.

It is an arithmetic number, because the mean of its divisors is an integer number (4014402).

Almost surely, 2^42055420 is an apocalyptic number.

It is an amenable number.

42055420 is an abundant number, since it is smaller than the sum of its proper divisors (54290228).

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

42055420 is a wasteful number, since it uses less digits than its factorization.

42055420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191181 (or 191179 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 42055420 is about 6485.0150346780. The cubic root of 42055420 is about 347.7554872879.

The spelling of 42055420 in words is "forty-two million, fifty-five thousand, four hundred twenty".