145655172 has 72 divisors (see below), whose sum is σ = 411226816. Its totient is φ = 44813088.

The previous prime is 145655171. The next prime is 145655173. The reversal of 145655172 is 271556541.

It is an interprime number because it is at equal distance from previous prime (145655171) and next prime (145655173).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (145655171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6873 + ... + 18399.

Almost surely, 2^145655172 is an apocalyptic number.

145655172 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 145655172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (205613408).

145655172 is an abundant number, since it is smaller than the sum of its proper divisors (265571644).

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

145655172 is a wasteful number, since it uses less digits than its factorization.

145655172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11559 (or 11545 counting only the distinct ones).

The product of its digits is 42000, while the sum is 36.

The square root of 145655172 is about 12068.7684541547. The cubic root of 145655172 is about 526.1488636860.

The spelling of 145655172 in words is "one hundred forty-five million, six hundred fifty-five thousand, one hundred seventy-two".