1240945042 has 16 divisors (see below), whose sum is σ = 1907925120. Its totient is φ = 605065968.

The previous prime is 1240945037. The next prime is 1240945051. The reversal of 1240945042 is 2405490421.

It is a junction number, because it is equal to n+sod(n) for n = 1240944995 and 1240945013.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2209 + ... + 49867.

It is an arithmetic number, because the mean of its divisors is an integer number (119245320).

Almost surely, 2^1240945042 is an apocalyptic number.

1240945042 is a deficient number, since it is larger than the sum of its proper divisors (666980078).

1240945042 is a wasteful number, since it uses less digits than its factorization.

1240945042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47985.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 1240945042 is about 35227.0498622862. The cubic root of 1240945042 is about 1074.6099300843.

The spelling of 1240945042 in words is "one billion, two hundred forty million, nine hundred forty-five thousand, forty-two".