142619965 has 4 divisors (see below), whose sum is σ = 171143964. Its totient is φ = 114095968.

The previous prime is 142619963. The next prime is 142620001. The reversal of 142619965 is 569916241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 569916241 = 23 ⋅24778967.

It can be written as a sum of positive squares in 2 ways, for example, as 62821476 + 79798489 = 7926^2 + 8933^2 .

It is a cyclic number.

It is not a de Polignac number, because 142619965 - 2¹ = 142619963 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 (142619963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14261992 + ... + 14262001.

It is an arithmetic number, because the mean of its divisors is an integer number (42785991).

Almost surely, 2^142619965 is an apocalyptic number.

It is an amenable number.

142619965 is a deficient number, since it is larger than the sum of its proper divisors (28523999).

142619965 is an equidigital number, since it uses as much as digits as its factorization.

142619965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28523998.

The product of its digits is 116640, while the sum is 43.

The square root of 142619965 is about 11942.3601101290. The cubic root of 142619965 is about 522.4684962271.

The spelling of 142619965 in words is "one hundred forty-two million, six hundred nineteen thousand, nine hundred sixty-five".