143902449 has 12 divisors (see below), whose sum is σ = 209700036. Its totient is φ = 95085312.

The previous prime is 143902439. The next prime is 143902469. The reversal of 143902449 is 944209341.

143902449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 77316849 + 66585600 = 8793^2 + 8160^2 .

It is not a de Polignac number, because 143902449 - 2⁸ = 143902193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (143902439) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69732 + ... + 71765.

It is an arithmetic number, because the mean of its divisors is an integer number (17475003).

Almost surely, 2^143902449 is an apocalyptic number.

It is an amenable number.

143902449 is a deficient number, since it is larger than the sum of its proper divisors (65797587).

143902449 is a wasteful number, since it uses less digits than its factorization.

143902449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141616 (or 141613 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 143902449 is about 11995.9346863844. The cubic root of 143902449 is about 524.0298928715.

The spelling of 143902449 in words is "one hundred forty-three million, nine hundred two thousand, four hundred forty-nine".