142665361 has 8 divisors (see below), whose sum is σ = 144129960. Its totient is φ = 141207168.

The previous prime is 142665353. The next prime is 142665373. The reversal of 142665361 is 163566241.

It can be written as a sum of positive squares in 4 ways, for example, as 101761 + 142563600 = 319^2 + 11940^2 .

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 142665361 - 2³ = 142665353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142665301) 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, 51955 + ... + 54631.

It is an arithmetic number, because the mean of its divisors is an integer number (18016245).

Almost surely, 2^142665361 is an apocalyptic number.

It is an amenable number.

142665361 is a deficient number, since it is larger than the sum of its proper divisors (1464599).

142665361 is a wasteful number, since it uses less digits than its factorization.

142665361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3203.

The product of its digits is 25920, while the sum is 34.

The square root of 142665361 is about 11944.2605882491. The cubic root of 142665361 is about 522.5239243336.

The spelling of 142665361 in words is "one hundred forty-two million, six hundred sixty-five thousand, three hundred sixty-one".