145591497 has 6 divisors (see below), whose sum is σ = 210298842. Its totient is φ = 97060992.

The previous prime is 145591493. The next prime is 145591499. The reversal of 145591497 is 794195541.

145591497 is a `hidden beast` number, since 1 + 4 + 559 + 1 + 4 + 97 = 666.

It can be written as a sum of positive squares in only one way, i.e., 126090441 + 19501056 = 11229^2 + 4416^2 .

It is not a de Polignac number, because 145591497 - 2² = 145591493 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145591493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8088408 + ... + 8088425.

It is an arithmetic number, because the mean of its divisors is an integer number (35049807).

Almost surely, 2^145591497 is an apocalyptic number.

It is an amenable number.

145591497 is a deficient number, since it is larger than the sum of its proper divisors (64707345).

145591497 is a wasteful number, since it uses less digits than its factorization.

145591497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16176839 (or 16176836 counting only the distinct ones).

The product of its digits is 226800, while the sum is 45.

The square root of 145591497 is about 12066.1301584228. The cubic root of 145591497 is about 526.0721816348.

The spelling of 145591497 in words is "one hundred forty-five million, five hundred ninety-one thousand, four hundred ninety-seven".