145972 has 6 divisors (see below), whose sum is σ = 255458. Its totient is φ = 72984.

The previous prime is 145969. The next prime is 145987. The reversal of 145972 is 279541.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 86436 + 59536 = 294^2 + 244^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 145972.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18243 + ... + 18250.

2¹⁴⁵⁹⁷² is an apocalyptic number.

It is an amenable number.

145972 is a deficient number, since it is larger than the sum of its proper divisors (109486).

145972 is a wasteful number, since it uses less digits than its factorization.

145972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36497 (or 36495 counting only the distinct ones).

The product of its digits is 2520, while the sum is 28.

The square root of 145972 is about 382.0628220594. The cubic root of 145972 is about 52.6530079056.

The spelling of 145972 in words is "one hundred forty-five thousand, nine hundred seventy-two".