145531254 has 32 divisors (see below), whose sum is σ = 336203136. Its totient is φ = 41505920.

The previous prime is 145531247. The next prime is 145531261. The reversal of 145531254 is 452135541.

It is an interprime number because it is at equal distance from previous prime (145531247) and next prime (145531261).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 63732 + ... + 65975.

It is an arithmetic number, because the mean of its divisors is an integer number (10506348).

Almost surely, 2^145531254 is an apocalyptic number.

145531254 is an abundant number, since it is smaller than the sum of its proper divisors (190671882).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145531254 is a wasteful number, since it uses less digits than its factorization.

145531254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129740.

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

The square root of 145531254 is about 12063.6335322323. The cubic root of 145531254 is about 525.9996120610. Note that the first 3 decimals are identical.

Adding to 145531254 its reverse (452135541), we get a palindrome (597666795).

The spelling of 145531254 in words is "one hundred forty-five million, five hundred thirty-one thousand, two hundred fifty-four".