142136453 has 4 divisors (see below), whose sum is σ = 147037740. Its totient is φ = 137235168.

The previous prime is 142136443. The next prime is 142136459. The reversal of 142136453 is 354631241.

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 86081284 + 56055169 = 9278^2 + 7487^2 .

It is a cyclic number.

It is not a de Polignac number, because 142136453 - 2²⁴ = 125359237 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 4901257 = 142136453 / (1 + 4 + 2 + 1 + 3 + 6 + 4 + 5 + 3).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142136459) 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, 2450600 + ... + 2450657.

It is an arithmetic number, because the mean of its divisors is an integer number (36759435).

Almost surely, 2^142136453 is an apocalyptic number.

It is an amenable number.

142136453 is a deficient number, since it is larger than the sum of its proper divisors (4901287).

142136453 is an equidigital number, since it uses as much as digits as its factorization.

142136453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4901286.

The product of its digits is 8640, while the sum is 29.

The square root of 142136453 is about 11922.0993537212. The cubic root of 142136453 is about 521.8774013204.

Adding to 142136453 its reverse (354631241), we get a palindrome (496767694).

The spelling of 142136453 in words is "one hundred forty-two million, one hundred thirty-six thousand, four hundred fifty-three".