142091865 has 48 divisors (see below), whose sum is σ = 262104336. Its totient is φ = 70963200.

The previous prime is 142091863. The next prime is 142091867. The reversal of 142091865 is 568190241.

It is an interprime number because it is at equal distance from previous prime (142091863) and next prime (142091867).

It can be written as a sum of positive squares in 8 ways, for example, as 14379264 + 127712601 = 3792^2 + 11301^2 .

It is not a de Polignac number, because 142091865 - 2¹ = 142091863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (142091863) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 214635 + ... + 215295.

It is an arithmetic number, because the mean of its divisors is an integer number (5460507).

Almost surely, 2^142091865 is an apocalyptic number.

142091865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

142091865 is a deficient number, since it is larger than the sum of its proper divisors (120012471).

142091865 is a wasteful number, since it uses less digits than its factorization.

142091865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970 (or 967 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 142091865 is about 11920.2292343730. The cubic root of 142091865 is about 521.8228248842.

The spelling of 142091865 in words is "one hundred forty-two million, ninety-one thousand, eight hundred sixty-five".