145423172 has 12 divisors (see below), whose sum is σ = 261368940. Its totient is φ = 70746336.

The previous prime is 145423163. The next prime is 145423177. The reversal of 145423172 is 271324541.

145423172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 117375556 + 28047616 = 10834^2 + 5296^2 .

It is a super-2 number, since 2×145423172² = 42295797909083168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145423177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 491147 + ... + 491442.

It is an arithmetic number, because the mean of its divisors is an integer number (21780745).

Almost surely, 2^145423172 is an apocalyptic number.

It is an amenable number.

145423172 is a deficient number, since it is larger than the sum of its proper divisors (115945768).

145423172 is a wasteful number, since it uses less digits than its factorization.

145423172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 982630 (or 982628 counting only the distinct ones).

The product of its digits is 6720, while the sum is 29.

The square root of 145423172 is about 12059.1530382527. The cubic root of 145423172 is about 525.8693647356.

The spelling of 145423172 in words is "one hundred forty-five million, four hundred twenty-three thousand, one hundred seventy-two".