142665641 has 8 divisors (see below), whose sum is σ = 145657344. Its totient is φ = 139695120.

The previous prime is 142665637. The next prime is 142665671. The reversal of 142665641 is 146566241.

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 142665641 - 2² = 142665637 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142665671) 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, 8696 + ... + 18998.

It is an arithmetic number, because the mean of its divisors is an integer number (18207168).

Almost surely, 2^142665641 is an apocalyptic number.

It is an amenable number.

142665641 is a deficient number, since it is larger than the sum of its proper divisors (2991703).

142665641 is a wasteful number, since it uses less digits than its factorization.

142665641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10591.

The product of its digits is 34560, while the sum is 35.

The square root of 142665641 is about 11944.2723093540. The cubic root of 142665641 is about 522.5242661746.

The spelling of 142665641 in words is "one hundred forty-two million, six hundred sixty-five thousand, six hundred forty-one".