1812543042 has 32 divisors (see below), whose sum is σ = 3662568000. Its totient is φ = 597961728.

The previous prime is 1812543041. The next prime is 1812543059. The reversal of 1812543042 is 2403452181.

It is a super-2 number, since 2×1812543042² = 6570624558205227528, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1812543041) 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, 277834 + ... + 284282.

It is an arithmetic number, because the mean of its divisors is an integer number (114455250).

Almost surely, 2^1812543042 is an apocalyptic number.

1812543042 is an abundant number, since it is smaller than the sum of its proper divisors (1850024958).

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

1812543042 is a wasteful number, since it uses less digits than its factorization.

1812543042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6930.

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 1812543042 is about 42573.9714144687. The cubic root of 1812543042 is about 1219.2593914926.

The spelling of 1812543042 in words is "one billion, eight hundred twelve million, five hundred forty-three thousand, forty-two".