142755257 has 4 divisors (see below), whose sum is σ = 142820496. Its totient is φ = 142690020.

The previous prime is 142755253. The next prime is 142755259. The reversal of 142755257 is 752557241.

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: 752557241 = 17 ⋅44268073.

It is a cyclic number.

It is not a de Polignac number, because 142755257 - 2² = 142755253 is a prime.

It is a super-2 number, since 2×142755257² = 40758126802272098, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 142755257.

It is not an unprimeable number, because it can be changed into a prime (142755251) 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, 29219 + ... + 33752.

It is an arithmetic number, because the mean of its divisors is an integer number (35705124).

Almost surely, 2^142755257 is an apocalyptic number.

It is an amenable number.

142755257 is a deficient number, since it is larger than the sum of its proper divisors (65239).

142755257 is an equidigital number, since it uses as much as digits as its factorization.

142755257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65238.

The product of its digits is 98000, while the sum is 38.

The square root of 142755257 is about 11948.0231419260. The cubic root of 142755257 is about 522.6336518519.

The spelling of 142755257 in words is "one hundred forty-two million, seven hundred fifty-five thousand, two hundred fifty-seven".