145481973 has 32 divisors (see below), whose sum is σ = 240979200. Its totient is φ = 76018176.

The previous prime is 145481957. The next prime is 145482013. The reversal of 145481973 is 379184541.

It is a happy number.

It is not a de Polignac number, because 145481973 - 2⁴ = 145481957 is a prime.

It is a Curzon number.

It is a plaindrome in base 9.

It is a zygodrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145481173) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27313 + ... + 32201.

It is an arithmetic number, because the mean of its divisors is an integer number (7530600).

Almost surely, 2^145481973 is an apocalyptic number.

145481973 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

145481973 is a deficient number, since it is larger than the sum of its proper divisors (95497227).

145481973 is a wasteful number, since it uses less digits than its factorization.

145481973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5021.

The product of its digits is 120960, while the sum is 42.

The square root of 145481973 is about 12061.5908154770. The cubic root of 145481973 is about 525.9402325745.

The spelling of 145481973 in words is "one hundred forty-five million, four hundred eighty-one thousand, nine hundred seventy-three".