142172237 has 4 divisors (see below), whose sum is σ = 142229340. Its totient is φ = 142115136.

The previous prime is 142172213. The next prime is 142172263. The reversal of 142172237 is 732271241.

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 51179716 + 90992521 = 7154^2 + 9539^2 .

It is a cyclic number.

It is not a de Polignac number, because 142172237 - 2¹⁰ = 142171213 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 (142172267) 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, 24638 + ... + 29855.

It is an arithmetic number, because the mean of its divisors is an integer number (35557335).

Almost surely, 2^142172237 is an apocalyptic number.

It is an amenable number.

142172237 is a deficient number, since it is larger than the sum of its proper divisors (57103).

142172237 is an equidigital number, since it uses as much as digits as its factorization.

142172237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57102.

The product of its digits is 4704, while the sum is 29.

The square root of 142172237 is about 11923.6000016773. The cubic root of 142172237 is about 521.9211932625.

The spelling of 142172237 in words is "one hundred forty-two million, one hundred seventy-two thousand, two hundred thirty-seven".