1142645205 has 32 divisors (see below), whose sum is σ = 1974188160. Its totient is φ = 561012480.

The previous prime is 1142645197. The next prime is 1142645227. The reversal of 1142645205 is 5025462411.

It is not a de Polignac number, because 1142645205 - 2³ = 1142645197 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66175 + ... + 81635.

It is an arithmetic number, because the mean of its divisors is an integer number (61693380).

Almost surely, 2^1142645205 is an apocalyptic number.

1142645205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1142645205 is a deficient number, since it is larger than the sum of its proper divisors (831542955).

1142645205 is a wasteful number, since it uses less digits than its factorization.

1142645205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15861.

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 1142645205 is about 33803.0354406228. The cubic root of 1142645205 is about 1045.4512843697.

The spelling of 1142645205 in words is "one billion, one hundred forty-two million, six hundred forty-five thousand, two hundred five".