142154431 has 4 divisors (see below), whose sum is σ = 145460392. Its totient is φ = 138848472.

The previous prime is 142154401. The next prime is 142154443. The reversal of 142154431 is 134451241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 142154431 - 2⁵ = 142154399 is a prime.

It is a super-2 number, since 2×142154431² = 40415764505867522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142154396 and 142154405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142154401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1652916 + ... + 1653001.

It is an arithmetic number, because the mean of its divisors is an integer number (36365098).

Almost surely, 2^142154431 is an apocalyptic number.

142154431 is a deficient number, since it is larger than the sum of its proper divisors (3305961).

142154431 is an equidigital number, since it uses as much as digits as its factorization.

142154431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3305960.

The product of its digits is 1920, while the sum is 25.

The square root of 142154431 is about 11922.8533078286. The cubic root of 142154431 is about 521.8994034556.

The spelling of 142154431 in words is "one hundred forty-two million, one hundred fifty-four thousand, four hundred thirty-one".