42147755 has 24 divisors (see below), whose sum is σ = 56568960. Its totient is φ = 30101760.

The previous prime is 42147737. The next prime is 42147769. The reversal of 42147755 is 55774124.

It is not a de Polignac number, because 42147755 - 2⁶ = 42147691 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25391 + ... + 26999.

It is an arithmetic number, because the mean of its divisors is an integer number (2357040).

Almost surely, 2^42147755 is an apocalyptic number.

42147755 is a deficient number, since it is larger than the sum of its proper divisors (14421205).

42147755 is a wasteful number, since it uses less digits than its factorization.

42147755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1671 (or 1658 counting only the distinct ones).

The product of its digits is 39200, while the sum is 35.

The square root of 42147755 is about 6492.1302359087. The cubic root of 42147755 is about 348.0098067215.

It can be divided in two parts, 4214 and 7755, that multiplied together give a triangular number (32679570 = T₈₀₈₄).

The spelling of 42147755 in words is "forty-two million, one hundred forty-seven thousand, seven hundred fifty-five".