145005994 has 20 divisors (see below), whose sum is σ = 253753794. Its totient is φ = 62143368.

The previous prime is 145005983. The next prime is 145006013. The reversal of 145005994 is 499500541.

It can be written as a sum of positive squares in only one way, i.e., 134861769 + 10144225 = 11613^2 + 3185^2 .

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 9 ways as a sum of consecutive naturals, for example, 10297 + ... + 19900.

Almost surely, 2^145005994 is an apocalyptic number.

145005994 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

145005994 is a deficient number, since it is larger than the sum of its proper divisors (108747800).

145005994 is an frugal number, since it uses more digits than its factorization.

145005994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30227 (or 30206 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 145005994 is about 12041.8434635233. The cubic root of 145005994 is about 525.3660262313.

The spelling of 145005994 in words is "one hundred forty-five million, five thousand, nine hundred ninety-four".