142213945 has 8 divisors (see below), whose sum is σ = 178076736. Its totient is φ = 108824496.

The previous prime is 142213937. The next prime is 142213949. The reversal of 142213945 is 549312241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 142213945 - 2³ = 142213937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142213949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 618207 + ... + 618436.

It is an arithmetic number, because the mean of its divisors is an integer number (22259592).

Almost surely, 2^142213945 is an apocalyptic number.

It is an amenable number.

142213945 is a deficient number, since it is larger than the sum of its proper divisors (35862791).

142213945 is a wasteful number, since it uses less digits than its factorization.

142213945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236671.

The product of its digits is 8640, while the sum is 31.

The square root of 142213945 is about 11925.3488418578. The cubic root of 142213945 is about 521.9722256377.

The spelling of 142213945 in words is "one hundred forty-two million, two hundred thirteen thousand, nine hundred forty-five".