145712431 has 4 divisors (see below), whose sum is σ = 150412864. Its totient is φ = 141012000.

The previous prime is 145712407. The next prime is 145712447. The reversal of 145712431 is 134217541.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 145712431 - 2⁹ = 145711919 is a prime.

It is a super-2 number, since 2×145712431² = 42464225095859522, 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 145712431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145712461) 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, 2350170 + ... + 2350231.

It is an arithmetic number, because the mean of its divisors is an integer number (37603216).

Almost surely, 2^145712431 is an apocalyptic number.

145712431 is a deficient number, since it is larger than the sum of its proper divisors (4700433).

145712431 is an equidigital number, since it uses as much as digits as its factorization.

145712431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4700432.

The product of its digits is 3360, while the sum is 28.

The square root of 145712431 is about 12071.1404183698. The cubic root of 145712431 is about 526.2178000433.

Adding to 145712431 its reverse (134217541), we get a palindrome (279929972).

The spelling of 145712431 in words is "one hundred forty-five million, seven hundred twelve thousand, four hundred thirty-one".