145226172 has 96 divisors (see below), whose sum is σ = 441649152. Its totient is φ = 36043776.

The previous prime is 145226161. The next prime is 145226219. The reversal of 145226172 is 271622541.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14653 + ... + 22475.

It is an arithmetic number, because the mean of its divisors is an integer number (4600512).

Almost surely, 2^145226172 is an apocalyptic number.

145226172 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 145226172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220824576).

145226172 is an abundant number, since it is smaller than the sum of its proper divisors (296422980).

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

145226172 is a wasteful number, since it uses less digits than its factorization.

145226172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7867 (or 7865 counting only the distinct ones).

The product of its digits is 6720, while the sum is 30.

The square root of 145226172 is about 12050.9822006341. The cubic root of 145226172 is about 525.6317981036.

The spelling of 145226172 in words is "one hundred forty-five million, two hundred twenty-six thousand, one hundred seventy-two".