145549812 has 24 divisors (see below), whose sum is σ = 340200000. Its totient is φ = 48433216.

The previous prime is 145549783. The next prime is 145549813. The reversal of 145549812 is 218945541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145549813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2937 + ... + 17312.

It is an arithmetic number, because the mean of its divisors is an integer number (14175000).

Almost surely, 2^145549812 is an apocalyptic number.

145549812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

145549812 is an abundant number, since it is smaller than the sum of its proper divisors (194650188).

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

145549812 is a wasteful number, since it uses less digits than its factorization.

145549812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20855 (or 20853 counting only the distinct ones).

The product of its digits is 57600, while the sum is 39.

The square root of 145549812 is about 12064.4026789560. The cubic root of 145549812 is about 526.0219694256.

The spelling of 145549812 in words is "one hundred forty-five million, five hundred forty-nine thousand, eight hundred twelve".