142871621 has 8 divisors (see below), whose sum is σ = 159238080. Its totient is φ = 127389888.

The previous prime is 142871581. The next prime is 142871647. The reversal of 142871621 is 126178241.

It is a happy number.

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 142871621 - 2⁶ = 142871557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142871021) 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, 220841 + ... + 221486.

It is an arithmetic number, because the mean of its divisors is an integer number (19904760).

Almost surely, 2^142871621 is an apocalyptic number.

It is an amenable number.

142871621 is a deficient number, since it is larger than the sum of its proper divisors (16366459).

142871621 is a wasteful number, since it uses less digits than its factorization.

142871621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442363.

The product of its digits is 5376, while the sum is 32.

The square root of 142871621 is about 11952.8917421685. The cubic root of 142871621 is about 522.7756179618.

The spelling of 142871621 in words is "one hundred forty-two million, eight hundred seventy-one thousand, six hundred twenty-one".