142291323 has 28 divisors (see below), whose sum is σ = 224589640. Its totient is φ = 89859456.

The previous prime is 142291321. The next prime is 142291349. The reversal of 142291323 is 323192241.

It is a happy number.

It is not a de Polignac number, because 142291323 - 2¹ = 142291321 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142291321) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 8715 + ... + 18987.

Almost surely, 2^142291323 is an apocalyptic number.

142291323 is a deficient number, since it is larger than the sum of its proper divisors (82298317).

142291323 is an equidigital number, since it uses as much as digits as its factorization.

142291323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10310 (or 10295 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 142291323 is about 11928.5926663626. The cubic root of 142291323 is about 522.0668760929.

The spelling of 142291323 in words is "one hundred forty-two million, two hundred ninety-one thousand, three hundred twenty-three".