142540253 has 4 divisors (see below), whose sum is σ = 144344640. Its totient is φ = 140735868.

The previous prime is 142540217. The next prime is 142540259. The reversal of 142540253 is 352045241.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 352045241 = 1217 ⋅289273.

It is a cyclic number.

It is not a de Polignac number, because 142540253 - 2¹⁸ = 142278109 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 (142540259) 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, 902075 + ... + 902232.

It is an arithmetic number, because the mean of its divisors is an integer number (36086160).

Almost surely, 2^142540253 is an apocalyptic number.

It is an amenable number.

142540253 is a deficient number, since it is larger than the sum of its proper divisors (1804387).

142540253 is an equidigital number, since it uses as much as digits as its factorization.

142540253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1804386.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 142540253 is about 11939.0222799022. The cubic root of 142540253 is about 522.3711401284.

Adding to 142540253 its reverse (352045241), we get a palindrome (494585494).

The spelling of 142540253 in words is "one hundred forty-two million, five hundred forty thousand, two hundred fifty-three".