145272987 has 16 divisors (see below), whose sum is σ = 215410560. Its totient is φ = 96762600.

The previous prime is 145272983. The next prime is 145273033. The reversal of 145272987 is 789272541.

It is a happy number.

It is not a de Polignac number, because 145272987 - 2² = 145272983 is a prime.

It is a super-2 number, since 2×145272987² = 42208481503804338, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (145272983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47412 + ... + 50382.

It is an arithmetic number, because the mean of its divisors is an integer number (13463160).

Almost surely, 2^145272987 is an apocalyptic number.

145272987 is a deficient number, since it is larger than the sum of its proper divisors (70137573).

145272987 is a wasteful number, since it uses less digits than its factorization.

145272987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4791 (or 4785 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 145272987 is about 12052.9244169206. The cubic root of 145272987 is about 525.6882727932.

The spelling of 145272987 in words is "one hundred forty-five million, two hundred seventy-two thousand, nine hundred eighty-seven".