145697972 has 36 divisors (see below), whose sum is σ = 306838980. Its totient is φ = 60286464.

The previous prime is 145697957. The next prime is 145697983. The reversal of 145697972 is 279796541.

145697972 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 63904036 + 81793936 = 7994^2 + 9044^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 145697972.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7133 + ... + 18500.

It is an arithmetic number, because the mean of its divisors is an integer number (8523305).

Almost surely, 2^145697972 is an apocalyptic number.

It is an amenable number.

145697972 is an abundant number, since it is smaller than the sum of its proper divisors (161141008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145697972 is a wasteful number, since it uses less digits than its factorization.

145697972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25680 (or 25671 counting only the distinct ones).

The product of its digits is 952560, while the sum is 50.

The square root of 145697972 is about 12070.5414957242. The cubic root of 145697972 is about 526.2003939903.

The spelling of 145697972 in words is "one hundred forty-five million, six hundred ninety-seven thousand, nine hundred seventy-two".