145023945 has 24 divisors (see below), whose sum is σ = 255053568. Its totient is φ = 70313760.

The previous prime is 145023881. The next prime is 145023973. The reversal of 145023945 is 549320541.

It is not a de Polignac number, because 145023945 - 2⁶ = 145023881 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38137 + ... + 41766.

It is an arithmetic number, because the mean of its divisors is an integer number (10627232).

Almost surely, 2^145023945 is an apocalyptic number.

145023945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

145023945 is a deficient number, since it is larger than the sum of its proper divisors (110029623).

145023945 is a wasteful number, since it uses less digits than its factorization.

145023945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79933 (or 79922 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 145023945 is about 12042.5887997556. The cubic root of 145023945 is about 525.3877045453.

The spelling of 145023945 in words is "one hundred forty-five million, twenty-three thousand, nine hundred forty-five".