142521253 has 6 divisors (see below), whose sum is σ = 165790086. Its totient is φ = 122161032.

The previous prime is 142521241. The next prime is 142521257. The reversal of 142521253 is 352125241.

It can be written as a sum of positive squares in only one way, i.e., 127644804 + 14876449 = 11298^2 + 3857^2 .

It is a de Polignac number, because none of the positive numbers 2^k-142521253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142521257) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1454250 + ... + 1454347.

It is an arithmetic number, because the mean of its divisors is an integer number (27631681).

Almost surely, 2^142521253 is an apocalyptic number.

It is an amenable number.

142521253 is a deficient number, since it is larger than the sum of its proper divisors (23268833).

142521253 is an equidigital number, since it uses as much as digits as its factorization.

142521253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2908611 (or 2908604 counting only the distinct ones).

The product of its digits is 2400, while the sum is 25.

The square root of 142521253 is about 11938.2265433355. The cubic root of 142521253 is about 522.3479291582.

Adding to 142521253 its reverse (352125241), we get a palindrome (494646494).

The spelling of 142521253 in words is "one hundred forty-two million, five hundred twenty-one thousand, two hundred fifty-three".