145172554 has 32 divisors (see below), whose sum is σ = 237758976. Its totient is φ = 66209280.

The previous prime is 145172551. The next prime is 145172563. The reversal of 145172554 is 455271541.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (145172551) 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 15 ways as a sum of consecutive naturals, for example, 310629 + ... + 311095.

It is an arithmetic number, because the mean of its divisors is an integer number (7429968).

Almost surely, 2^145172554 is an apocalyptic number.

145172554 is a deficient number, since it is larger than the sum of its proper divisors (92586422).

145172554 is a wasteful number, since it uses less digits than its factorization.

145172554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750.

The product of its digits is 28000, while the sum is 34.

The square root of 145172554 is about 12048.7573633134. The cubic root of 145172554 is about 525.5671017876.

It can be divided in two parts, 14517 and 2554, that added together give a palindrome (17071).

The spelling of 145172554 in words is "one hundred forty-five million, one hundred seventy-two thousand, five hundred fifty-four".