145199420 has 12 divisors (see below), whose sum is σ = 304918824. Its totient is φ = 58079760.

The previous prime is 145199377. The next prime is 145199479. The reversal of 145199420 is 24991541.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 3629966 + ... + 3630005.

It is an arithmetic number, because the mean of its divisors is an integer number (25409902).

Almost surely, 2^145199420 is an apocalyptic number.

145199420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145199420 is an abundant number, since it is smaller than the sum of its proper divisors (159719404).

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

145199420 is a wasteful number, since it uses less digits than its factorization.

145199420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7259980 (or 7259978 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 145199420 is about 12049.8721984924. The cubic root of 145199420 is about 525.5995207135.

The spelling of 145199420 in words is "one hundred forty-five million, one hundred ninety-nine thousand, four hundred twenty".