145509612 has 24 divisors (see below), whose sum is σ = 339766896. Its totient is φ = 48468288.

The previous prime is 145509607. The next prime is 145509671. The reversal of 145509612 is 216905541.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 17298 + ... + 24294.

It is an arithmetic number, because the mean of its divisors is an integer number (14156954).

Almost surely, 2^145509612 is an apocalyptic number.

145509612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

145509612 is an abundant number, since it is smaller than the sum of its proper divisors (194257284).

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

145509612 is a wasteful number, since it uses less digits than its factorization.

145509612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8737 (or 8735 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 145509612 is about 12062.7365054535. The cubic root of 145509612 is about 525.9735369107.

The spelling of 145509612 in words is "one hundred forty-five million, five hundred nine thousand, six hundred twelve".