42169647 has 16 divisors (see below), whose sum is σ = 61322240. Its totient is φ = 25620192.

The previous prime is 42169643. The next prime is 42169651. The reversal of 42169647 is 74696124.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (42169643) and next prime (42169651).

It is not a de Polignac number, because 42169647 - 2² = 42169643 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42169643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3763 + ... + 9924.

It is an arithmetic number, because the mean of its divisors is an integer number (3832640).

Almost surely, 2^42169647 is an apocalyptic number.

42169647 is a deficient number, since it is larger than the sum of its proper divisors (19152593).

42169647 is a wasteful number, since it uses less digits than its factorization.

42169647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13782.

The product of its digits is 72576, while the sum is 39.

The square root of 42169647 is about 6493.8160583743. The cubic root of 42169647 is about 348.0700496455.

The spelling of 42169647 in words is "forty-two million, one hundred sixty-nine thousand, six hundred forty-seven".