142747645 has 4 divisors (see below), whose sum is σ = 171297180. Its totient is φ = 114198112.

The previous prime is 142747639. The next prime is 142747651. The reversal of 142747645 is 546747241.

142747645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 546747241 = 191 ⋅2862551.

It is an interprime number because it is at equal distance from previous prime (142747639) and next prime (142747651).

It can be written as a sum of positive squares in 2 ways, for example, as 101646724 + 41100921 = 10082^2 + 6411^2 .

It is a cyclic number.

It is not a de Polignac number, because 142747645 - 2⁵ = 142747613 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 142747598 and 142747607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14274760 + ... + 14274769.

It is an arithmetic number, because the mean of its divisors is an integer number (42824295).

Almost surely, 2^142747645 is an apocalyptic number.

It is an amenable number.

142747645 is a deficient number, since it is larger than the sum of its proper divisors (28549535).

142747645 is an equidigital number, since it uses as much as digits as its factorization.

142747645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28549534.

The product of its digits is 188160, while the sum is 40.

The square root of 142747645 is about 11947.7045912594. The cubic root of 142747645 is about 522.6243623911.

The spelling of 142747645 in words is "one hundred forty-two million, seven hundred forty-seven thousand, six hundred forty-five".