142444231 has 8 divisors (see below), whose sum is σ = 147594960. Its totient is φ = 137384832.

The previous prime is 142444213. The next prime is 142444249. The reversal of 142444231 is 132444241.

It is an interprime number because it is at equal distance from previous prime (142444213) and next prime (142444249).

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 142444231 - 2⁷ = 142444103 is a prime.

It is a super-2 number, since 2×142444231² = 40580717890362722, 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 = 142444196 and 142444205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142444331) 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, 19650 + ... + 25903.

It is an arithmetic number, because the mean of its divisors is an integer number (18449370).

Almost surely, 2^142444231 is an apocalyptic number.

142444231 is a deficient number, since it is larger than the sum of its proper divisors (5150729).

142444231 is an equidigital number, since it uses as much as digits as its factorization.

142444231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45665.

The product of its digits is 3072, while the sum is 25.

The square root of 142444231 is about 11935.0002513615. Note that the first 3 decimals coincide. The cubic root of 142444231 is about 522.2538156347.

Adding to 142444231 its reverse (132444241), we get a palindrome (274888472).

The spelling of 142444231 in words is "one hundred forty-two million, four hundred forty-four thousand, two hundred thirty-one".