145282991 has 12 divisors (see below), whose sum is σ = 169199712. Its totient is φ = 124383168.

The previous prime is 145282981. The next prime is 145282997. The reversal of 145282991 is 199282541.

It is not a de Polignac number, because 145282991 - 2²² = 141088687 is a prime.

It is a super-2 number, since 2×145282991² = 42214294947812162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145282997) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76631 + ... + 78503.

It is an arithmetic number, because the mean of its divisors is an integer number (14099976).

Almost surely, 2^145282991 is an apocalyptic number.

145282991 is a deficient number, since it is larger than the sum of its proper divisors (23916721).

145282991 is a wasteful number, since it uses less digits than its factorization.

145282991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3470 (or 3463 counting only the distinct ones).

The product of its digits is 51840, while the sum is 41.

The square root of 145282991 is about 12053.3394127935. The cubic root of 145282991 is about 525.7003394200.

The spelling of 145282991 in words is "one hundred forty-five million, two hundred eighty-two thousand, nine hundred ninety-one".