42169021 has 8 divisors (see below), whose sum is σ = 43939584. Its totient is φ = 40424160.

The previous prime is 42169019. The next prime is 42169067. The reversal of 42169021 is 12096124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42169021 - 2¹ = 42169019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42169091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3040 + ... + 9673.

It is an arithmetic number, because the mean of its divisors is an integer number (5492448).

Almost surely, 2^42169021 is an apocalyptic number.

It is an amenable number.

42169021 is a deficient number, since it is larger than the sum of its proper divisors (1770563).

42169021 is a wasteful number, since it uses less digits than its factorization.

42169021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12851.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 42169021 is about 6493.7678584932. The cubic root of 42169021 is about 348.0683272935.

The spelling of 42169021 in words is "forty-two million, one hundred sixty-nine thousand, twenty-one".