145331712 has 80 divisors (see below), whose sum is σ = 430232880. Its totient is φ = 48439296.

The previous prime is 145331677. The next prime is 145331717. The reversal of 145331712 is 217133541.

It is a super-2 number, since 2×145331712² = 42242613025701888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145331717) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8568 + ... + 19080.

It is an arithmetic number, because the mean of its divisors is an integer number (5377911).

Almost surely, 2^145331712 is an apocalyptic number.

145331712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 145331712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215116440).

145331712 is an abundant number, since it is smaller than the sum of its proper divisors (284901168).

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

145331712 is an equidigital number, since it uses as much as digits as its factorization.

145331712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10540 (or 10518 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 145331712 is about 12055.3603015422. The cubic root of 145331712 is about 525.7590978094.

The spelling of 145331712 in words is "one hundred forty-five million, three hundred thirty-one thousand, seven hundred twelve".