142401331 has 4 divisors (see below), whose sum is σ = 144526792. Its totient is φ = 140275872.

The previous prime is 142401313. The next prime is 142401353. The reversal of 142401331 is 133104241.

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 142401331 - 2²⁷ = 8183603 is a prime.

It is a super-2 number, since 2×142401331² = 40556278141143122, 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 = 142401299 and 142401308.

It is not an unprimeable number, because it can be changed into a prime (142401361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1062630 + ... + 1062763.

It is an arithmetic number, because the mean of its divisors is an integer number (36131698).

Almost surely, 2^142401331 is an apocalyptic number.

142401331 is a deficient number, since it is larger than the sum of its proper divisors (2125461).

142401331 is an equidigital number, since it uses as much as digits as its factorization.

142401331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2125460.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 142401331 is about 11933.2028810374. The cubic root of 142401331 is about 522.2013812232.

Adding to 142401331 its reverse (133104241), we get a palindrome (275505572).

The spelling of 142401331 in words is "one hundred forty-two million, four hundred one thousand, three hundred thirty-one".