145163972 has 6 divisors (see below), whose sum is σ = 254036958. Its totient is φ = 72581984.

The previous prime is 145163951. The next prime is 145163999. The reversal of 145163972 is 279361541.

It can be written as a sum of positive squares in only one way, i.e., 133494916 + 11669056 = 11554^2 + 3416^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 18145493 + ... + 18145500.

It is an arithmetic number, because the mean of its divisors is an integer number (42339493).

Almost surely, 2^145163972 is an apocalyptic number.

It is an amenable number.

145163972 is a deficient number, since it is larger than the sum of its proper divisors (108872986).

145163972 is a wasteful number, since it uses less digits than its factorization.

145163972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36290997 (or 36290995 counting only the distinct ones).

The product of its digits is 45360, while the sum is 38.

The square root of 145163972 is about 12048.4012217389. The cubic root of 145163972 is about 525.5567451336.

The spelling of 145163972 in words is "one hundred forty-five million, one hundred sixty-three thousand, nine hundred seventy-two".