42155450 has 24 divisors (see below), whose sum is σ = 78744960. Its totient is φ = 16790000.

The previous prime is 42155447. The next prime is 42155459. The reversal of 42155450 is 5455124.

It is not an unprimeable number, because it can be changed into a prime (42155459) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10871 + ... + 14229.

It is an arithmetic number, because the mean of its divisors is an integer number (3281040).

Almost surely, 2^42155450 is an apocalyptic number.

42155450 is a deficient number, since it is larger than the sum of its proper divisors (36589510).

42155450 is a wasteful number, since it uses less digits than its factorization.

42155450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3622 (or 3617 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 42155450 is about 6492.7228494677. The cubic root of 42155450 is about 348.0309843817.

The spelling of 42155450 in words is "forty-two million, one hundred fifty-five thousand, four hundred fifty".