145542531 has 8 divisors (see below), whose sum is σ = 195774480. Its totient is φ = 96169472.

The previous prime is 145542521. The next prime is 145542533. The reversal of 145542531 is 135245541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145542531 - 2²² = 141348227 is a prime.

It is a super-2 number, since 2×145542531² = 42365256659771922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145542533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214326 + ... + 215003.

It is an arithmetic number, because the mean of its divisors is an integer number (24471810).

Almost surely, 2^145542531 is an apocalyptic number.

145542531 is a deficient number, since it is larger than the sum of its proper divisors (50231949).

145542531 is a wasteful number, since it uses less digits than its factorization.

145542531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429445.

The product of its digits is 12000, while the sum is 30.

The square root of 145542531 is about 12064.1009196707. The cubic root of 145542531 is about 526.0131980188.

The spelling of 145542531 in words is "one hundred forty-five million, five hundred forty-two thousand, five hundred thirty-one".