143784081 has 27 divisors (see below), whose sum is σ = 242020233. Its totient is φ = 82018440.

The previous prime is 143784061. The next prime is 143784097. The reversal of 143784081 is 180487341.

The square root of 143784081 is 11991.

It is a perfect power (a square), and thus also a powerful number.

143784081 is nontrivially palindromic in base 2.

It is not a de Polignac number, because 143784081 - 2⁷ = 143783953 is a prime.

It is a super-2 number, since 2×143784081² = 41347723898029122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (143784031) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 251526 + ... + 252096.

Almost surely, 2^143784081 is an apocalyptic number.

143784081 is the 11991-st square number.

143784081 is the 5996-th centered octagonal number.

It is an amenable number.

143784081 is a deficient number, since it is larger than the sum of its proper divisors (98236152).

143784081 is an frugal number, since it uses more digits than its factorization.

143784081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162 (or 581 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The cubic root of 143784081 is about 523.8861719322.

Multiplying 143784081 by its sum of digits (36), we get a square (5176226916 = 71946²).

The spelling of 143784081 in words is "one hundred forty-three million, seven hundred eighty-four thousand, eighty-one".