142611909 has 32 divisors (see below), whose sum is σ = 213580800. Its totient is φ = 83909760.

The previous prime is 142611901. The next prime is 142611913. The reversal of 142611909 is 909116241.

It is not a de Polignac number, because 142611909 - 2³ = 142611901 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 142611909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142611901) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 172872 + ... + 173694.

It is an arithmetic number, because the mean of its divisors is an integer number (6674400).

Almost surely, 2^142611909 is an apocalyptic number.

It is an amenable number.

142611909 is a deficient number, since it is larger than the sum of its proper divisors (70968891).

142611909 is a wasteful number, since it uses less digits than its factorization.

142611909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 985.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 142611909 is about 11942.0228186015. The cubic root of 142611909 is about 522.4586586950.

The spelling of 142611909 in words is "one hundred forty-two million, six hundred eleven thousand, nine hundred nine".