142401591 has 8 divisors (see below), whose sum is σ = 210965360. Its totient is φ = 94934376.

The previous prime is 142401577. The next prime is 142401601. The reversal of 142401591 is 195104241.

142401591 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 142401591 - 2⁵ = 142401559 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 5274133 = 142401591 / (1 + 4 + 2 + 4 + 0 + 1 + 5 + 9 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142401491) 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, 2637040 + ... + 2637093.

It is an arithmetic number, because the mean of its divisors is an integer number (26370670).

Almost surely, 2^142401591 is an apocalyptic number.

142401591 is a deficient number, since it is larger than the sum of its proper divisors (68563769).

142401591 is an equidigital number, since it uses as much as digits as its factorization.

142401591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5274142 (or 5274136 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 142401591 is about 11933.2137750063. The cubic root of 142401591 is about 522.2016990392.

The spelling of 142401591 in words is "one hundred forty-two million, four hundred one thousand, five hundred ninety-one".