143457381 has 6 divisors (see below), whose sum is σ = 207216230. Its totient is φ = 95638248.

The previous prime is 143457359. The next prime is 143457383. The reversal of 143457381 is 183754341.

It is a happy number.

143457381 is a `hidden beast` number, since 1 + 4 + 3 + 4 + 573 + 81 = 666.

143457381 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 only one way, i.e., 89302500 + 54154881 = 9450^2 + 7359^2 .

It is not a de Polignac number, because 143457381 - 2⁶ = 143457317 is a prime.

It is a super-2 number, since 2×143457381² = 41160040326758322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143457383) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7969846 + ... + 7969863.

Almost surely, 2^143457381 is an apocalyptic number.

It is an amenable number.

143457381 is a deficient number, since it is larger than the sum of its proper divisors (63758849).

143457381 is a wasteful number, since it uses less digits than its factorization.

143457381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15939715 (or 15939712 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 143457381 is about 11977.3695359206. The cubic root of 143457381 is about 523.4890871637.

The spelling of 143457381 in words is "one hundred forty-three million, four hundred fifty-seven thousand, three hundred eighty-one".