130440042 has 24 divisors (see below), whose sum is σ = 283214880. Its totient is φ = 43388520.

The previous prime is 130440041. The next prime is 130440067. The reversal of 130440042 is 240044031.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 130439997 and 130440024.

It is not an unprimeable number, because it can be changed into a prime (130440041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1459 + ... + 16217.

It is an arithmetic number, because the mean of its divisors is an integer number (11800620).

Almost surely, 2^130440042 is an apocalyptic number.

130440042 is an abundant number, since it is smaller than the sum of its proper divisors (152774838).

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

130440042 is a wasteful number, since it uses less digits than its factorization.

130440042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15258 (or 15255 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 130440042 is about 11421.0350669280. The cubic root of 130440042 is about 507.1506385710.

Adding to 130440042 its reverse (240044031), we get a palindrome (370484073).

The spelling of 130440042 in words is "one hundred thirty million, four hundred forty thousand, forty-two".