145120899 has 32 divisors (see below), whose sum is σ = 246182400. Its totient is φ = 75381600.

The previous prime is 145120897. The next prime is 145120939. The reversal of 145120899 is 998021541.

It is not a de Polignac number, because 145120899 - 2¹ = 145120897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145120897) 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 31 ways as a sum of consecutive naturals, for example, 4909 + ... + 17729.

It is an arithmetic number, because the mean of its divisors is an integer number (7693200).

Almost surely, 2^145120899 is an apocalyptic number.

145120899 is a deficient number, since it is larger than the sum of its proper divisors (101061501).

145120899 is a wasteful number, since it uses less digits than its factorization.

145120899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12856 (or 12842 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 39.

The square root of 145120899 is about 12046.6135905490. The cubic root of 145120899 is about 525.5047589906.

The spelling of 145120899 in words is "one hundred forty-five million, one hundred twenty thousand, eight hundred ninety-nine".