142065661 has 4 divisors (see below), whose sum is σ = 144186112. Its totient is φ = 139945212.

The previous prime is 142065659. The next prime is 142065727. The reversal of 142065661 is 166560241.

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 a cyclic number.

It is not a de Polignac number, because 142065661 - 2¹ = 142065659 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 (142065611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1060125 + ... + 1060258.

It is an arithmetic number, because the mean of its divisors is an integer number (36046528).

Almost surely, 2^142065661 is an apocalyptic number.

It is an amenable number.

142065661 is a deficient number, since it is larger than the sum of its proper divisors (2120451).

142065661 is an equidigital number, since it uses as much as digits as its factorization.

142065661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2120450.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 142065661 is about 11919.1300437574. The cubic root of 142065661 is about 521.7907454358.

It can be divided in two parts, 1420 and 65661, that added together give a square (67081 = 259²).

The spelling of 142065661 in words is "one hundred forty-two million, sixty-five thousand, six hundred sixty-one".