145127531 has 4 divisors (see below), whose sum is σ = 145166064. Its totient is φ = 145089000.

The previous prime is 145127527. The next prime is 145127573. The reversal of 145127531 is 135721541.

145127531 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.

It is a cyclic number.

It is not a de Polignac number, because 145127531 - 2² = 145127527 is a prime.

It is a super-2 number, since 2×145127531² = 42124000508311922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145127494 and 145127503.

It is not an unprimeable number, because it can be changed into a prime (145127131) 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, 12920 + ... + 21381.

It is an arithmetic number, because the mean of its divisors is an integer number (36291516).

Almost surely, 2^145127531 is an apocalyptic number.

145127531 is a deficient number, since it is larger than the sum of its proper divisors (38533).

145127531 is an equidigital number, since it uses as much as digits as its factorization.

145127531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38532.

The product of its digits is 4200, while the sum is 29.

The square root of 145127531 is about 12046.8888514836. Note that the first 4 decimals coincide. The cubic root of 145127531 is about 525.5127640275.

It can be divided in two parts, 1451 and 27531, that added together give a palindrome (28982).

The spelling of 145127531 in words is "one hundred forty-five million, one hundred twenty-seven thousand, five hundred thirty-one".