145617072 has 20 divisors (see below), whose sum is σ = 376177560. Its totient is φ = 48539008.

The previous prime is 145617061. The next prime is 145617097. The reversal of 145617072 is 270716541.

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 3 ways as a sum of consecutive naturals, for example, 1516797 + ... + 1516892.

It is an arithmetic number, because the mean of its divisors is an integer number (18808878).

Almost surely, 2^145617072 is an apocalyptic number.

145617072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

145617072 is an abundant number, since it is smaller than the sum of its proper divisors (230560488).

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

145617072 is a wasteful number, since it uses less digits than its factorization.

145617072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3033700 (or 3033694 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 145617072 is about 12067.1898965749. The cubic root of 145617072 is about 526.1029835900.

It can be divided in two parts, 1456 and 17072, that added together give a triangular number (18528 = T₁₉₂).

The spelling of 145617072 in words is "one hundred forty-five million, six hundred seventeen thousand, seventy-two".