143121040 has 40 divisors (see below), whose sum is σ = 336070008. Its totient is φ = 56678400.

The previous prime is 143121031. The next prime is 143121049. The reversal of 143121040 is 40121341.

It is an interprime number because it is at equal distance from previous prime (143121031) and next prime (143121049).

It can be written as a sum of positive squares in 4 ways, for example, as 84934656 + 58186384 = 9216^2 + 7628^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (143121049) 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, 777 + ... + 16936.

Almost surely, 2^143121040 is an apocalyptic number.

143121040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 143121040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168035004).

143121040 is an abundant number, since it is smaller than the sum of its proper divisors (192948968).

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

143121040 is a wasteful number, since it uses less digits than its factorization.

143121040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17827 (or 17821 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 143121040 is about 11963.3206092623. The cubic root of 143121040 is about 523.0796540093.

Adding to 143121040 its reverse (40121341), we get a palindrome (183242381).

The spelling of 143121040 in words is "one hundred forty-three million, one hundred twenty-one thousand, forty".