42146840 has 32 divisors (see below), whose sum is σ = 95904000. Its totient is φ = 16667904.

The previous prime is 42146821. The next prime is 42146849. The reversal of 42146840 is 4864124.

It is a super-2 number, since 2×42146840² = 3552712243971200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42146849) 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, 2360 + ... + 9479.

It is an arithmetic number, because the mean of its divisors is an integer number (2997000).

Almost surely, 2^42146840 is an apocalyptic number.

42146840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42146840 is an abundant number, since it is smaller than the sum of its proper divisors (53757160).

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

42146840 is a wasteful number, since it uses less digits than its factorization.

42146840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11939 (or 11935 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 42146840 is about 6492.0597655906. The cubic root of 42146840 is about 348.0072883487.

The spelling of 42146840 in words is "forty-two million, one hundred forty-six thousand, eight hundred forty".