145199994 has 8 divisors (see below), whose sum is σ = 290400000. Its totient is φ = 48399996.

The previous prime is 145199981. The next prime is 145200031. The reversal of 145199994 is 499991541.

It is a happy number.

145199994 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.

145199994 is an admirable 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, 12099994 + ... + 12100005.

It is an arithmetic number, because the mean of its divisors is an integer number (36300000).

Almost surely, 2^145199994 is an apocalyptic number.

145199994 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

145199994 is a wasteful number, since it uses less digits than its factorization.

145199994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24200004.

The product of its digits is 524880, while the sum is 51.

The square root of 145199994 is about 12049.8960161489. The cubic root of 145199994 is about 525.6002133098.

The spelling of 145199994 in words is "one hundred forty-five million, one hundred ninety-nine thousand, nine hundred ninety-four".