142090581 has 4 divisors (see below), whose sum is σ = 189454112. Its totient is φ = 94727052.

The previous prime is 142090549. The next prime is 142090583. The reversal of 142090581 is 185090241.

It is a happy number.

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 not a de Polignac number, because 142090581 - 2⁵ = 142090549 is a prime.

It is a super-2 number, since 2×142090581² = 40379466417835122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142090583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23681761 + ... + 23681766.

It is an arithmetic number, because the mean of its divisors is an integer number (47363528).

Almost surely, 2^142090581 is an apocalyptic number.

It is an amenable number.

142090581 is a deficient number, since it is larger than the sum of its proper divisors (47363531).

142090581 is an equidigital number, since it uses as much as digits as its factorization.

142090581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47363530.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 142090581 is about 11920.1753762266. The cubic root of 142090581 is about 521.8212530782.

The spelling of 142090581 in words is "one hundred forty-two million, ninety thousand, five hundred eighty-one".