144531720 has 48 divisors (see below), whose sum is σ = 469729260. Its totient is φ = 38541696.

The previous prime is 144531713. The next prime is 144531733. The reversal of 144531720 is 27135441.

It can be written as a sum of positive squares in 2 ways, for example, as 143856036 + 675684 = 11994^2 + 822^2 .

It is a super-3 number, since 3×144531720³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 200379 + ... + 201098.

Almost surely, 2^144531720 is an apocalyptic number.

144531720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

144531720 is an abundant number, since it is smaller than the sum of its proper divisors (325197540).

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

144531720 is a wasteful number, since it uses less digits than its factorization.

144531720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401494 (or 401487 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 144531720 is about 12022.1345858379. The cubic root of 144531720 is about 524.7926255811.

The spelling of 144531720 in words is "one hundred forty-four million, five hundred thirty-one thousand, seven hundred twenty".