142304381 has 4 divisors (see below), whose sum is σ = 148491552. Its totient is φ = 136117212.

The previous prime is 142304339. The next prime is 142304411. The reversal of 142304381 is 183403241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142304381 is a prime.

It is a super-2 number, since 2×142304381² = 40501073703586322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 142304381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142307381) 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, 3093551 + ... + 3093596.

It is an arithmetic number, because the mean of its divisors is an integer number (37122888).

Almost surely, 2^142304381 is an apocalyptic number.

It is an amenable number.

142304381 is a deficient number, since it is larger than the sum of its proper divisors (6187171).

142304381 is an equidigital number, since it uses as much as digits as its factorization.

142304381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6187170.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 142304381 is about 11929.1399941488. The cubic root of 142304381 is about 522.0828455388.

The spelling of 142304381 in words is "one hundred forty-two million, three hundred four thousand, three hundred eighty-one".