142620891 has 8 divisors (see below), whose sum is σ = 217327104. Its totient is φ = 81497640.

The previous prime is 142620883. The next prime is 142620923. The reversal of 142620891 is 198026241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 142620891 - 2³ = 142620883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (142620851) 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 7 ways as a sum of consecutive naturals, for example, 3395715 + ... + 3395756.

It is an arithmetic number, because the mean of its divisors is an integer number (27165888).

Almost surely, 2^142620891 is an apocalyptic number.

142620891 is a deficient number, since it is larger than the sum of its proper divisors (74706213).

142620891 is an equidigital number, since it uses as much as digits as its factorization.

142620891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6791481.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 142620891 is about 11942.3988796221. The cubic root of 142620891 is about 522.4696269823.

It can be divided in two parts, 14 and 2620891, that added together give a triangular number (2620905 = T₂₂₈₉).

The spelling of 142620891 in words is "one hundred forty-two million, six hundred twenty thousand, eight hundred ninety-one".