145272474 has 32 divisors (see below), whose sum is σ = 323317440. Its totient is φ = 48350736.

The previous prime is 145272473. The next prime is 145272487. The reversal of 145272474 is 474272541.

It is a super-2 number, since 2×145272474² = 42208183404161352, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145272473) 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 15 ways as a sum of consecutive naturals, for example, 43032 + ... + 46284.

It is an arithmetic number, because the mean of its divisors is an integer number (10103670).

Almost surely, 2^145272474 is an apocalyptic number.

145272474 is an abundant number, since it is smaller than the sum of its proper divisors (178044966).

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

145272474 is a wasteful number, since it uses less digits than its factorization.

145272474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4091 (or 4085 counting only the distinct ones).

The product of its digits is 62720, while the sum is 36.

The square root of 145272474 is about 12052.9031357595. The cubic root of 145272474 is about 525.6876540078.

The spelling of 145272474 in words is "one hundred forty-five million, two hundred seventy-two thousand, four hundred seventy-four".