42155478 has 40 divisors (see below), whose sum is σ = 100022472. Its totient is φ = 13224384.

The previous prime is 42155467. The next prime is 42155483. The reversal of 42155478 is 87455124.

42155478 is nontrivially palindromic in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4900 + ... + 10407.

Almost surely, 2^42155478 is an apocalyptic number.

42155478 is an abundant number, since it is smaller than the sum of its proper divisors (57866994).

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

42155478 is a wasteful number, since it uses less digits than its factorization.

42155478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15338 (or 15329 counting only the distinct ones).

The product of its digits is 44800, while the sum is 36.

The square root of 42155478 is about 6492.7250057276. The cubic root of 42155478 is about 348.0310614367.

The spelling of 42155478 in words is "forty-two million, one hundred fifty-five thousand, four hundred seventy-eight".