142596221 has 4 divisors (see below), whose sum is σ = 150984252. Its totient is φ = 134208192.

The previous prime is 142596211. The next prime is 142596247. The reversal of 142596221 is 122695241.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 94848121 + 47748100 = 9739^2 + 6910^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142596221 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 (142596211) 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, 4193990 + ... + 4194023.

It is an arithmetic number, because the mean of its divisors is an integer number (37746063).

Almost surely, 2^142596221 is an apocalyptic number.

It is an amenable number.

142596221 is a deficient number, since it is larger than the sum of its proper divisors (8388031).

142596221 is an equidigital number, since it uses as much as digits as its factorization.

142596221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8388030.

The product of its digits is 8640, while the sum is 32.

The square root of 142596221 is about 11941.3659603916. The cubic root of 142596221 is about 522.4395003324.

The spelling of 142596221 in words is "one hundred forty-two million, five hundred ninety-six thousand, two hundred twenty-one".