145139990 has 8 divisors (see below), whose sum is σ = 261252000. Its totient is φ = 58055992.

The previous prime is 145139957. The next prime is 145140013. The reversal of 145139990 is 99931541.

145139990 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7256990 + ... + 7257009.

It is an arithmetic number, because the mean of its divisors is an integer number (32656500).

Almost surely, 2^145139990 is an apocalyptic number.

145139990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

145139990 is a deficient number, since it is larger than the sum of its proper divisors (116112010).

145139990 is a wasteful number, since it uses less digits than its factorization.

145139990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14514006.

The product of its (nonzero) digits is 43740, while the sum is 41.

The square root of 145139990 is about 12047.4059448497. The cubic root of 145139990 is about 525.5278017811.

The spelling of 145139990 in words is "one hundred forty-five million, one hundred thirty-nine thousand, nine hundred ninety".