140142009 has 12 divisors (see below), whose sum is σ = 217363344. Its totient is φ = 80081064.

The previous prime is 140141993. The next prime is 140142019. The reversal of 140142009 is 900241041.

140142009 = 1147² + 1148² + ... + 1244².

140142009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 140142009 - 2⁴ = 140141993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (140142019) 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, 476527 + ... + 476820.

It is an arithmetic number, because the mean of its divisors is an integer number (18113612).

Almost surely, 2^140142009 is an apocalyptic number.

It is an amenable number.

140142009 is a deficient number, since it is larger than the sum of its proper divisors (77221335).

140142009 is an equidigital number, since it uses as much as digits as its factorization.

140142009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953364 (or 953357 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 140142009 is about 11838.1590207262. The cubic root of 140142009 is about 519.4249177362.

The spelling of 140142009 in words is "one hundred forty million, one hundred forty-two thousand, nine".