1200143421 has 12 divisors (see below), whose sum is σ = 1735828380. Its totient is φ = 799039680.

The previous prime is 1200143411. The next prime is 1200143423. The reversal of 1200143421 is 1243410021.

1200143421 is a `hidden beast` number, since 1 + 200 + 1 + 43 + 421 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 133402500 + 1066740921 = 11550^2 + 32661^2 .

It is not a de Polignac number, because 1200143421 - 2⁵ = 1200143389 is a prime.

It is a super-3 number, since 3×1200143421³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1200143394 and 1200143403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200143423) 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, 80766 + ... + 94463.

It is an arithmetic number, because the mean of its divisors is an integer number (144652365).

Almost surely, 2^1200143421 is an apocalyptic number.

It is an amenable number.

1200143421 is a deficient number, since it is larger than the sum of its proper divisors (535684959).

1200143421 is a wasteful number, since it uses less digits than its factorization.

1200143421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175996 (or 175993 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1200143421 is about 34643.0861933518. The cubic root of 1200143421 is about 1062.7009029280.

Adding to 1200143421 its reverse (1243410021), we get a palindrome (2443553442).

The spelling of 1200143421 in words is "one billion, two hundred million, one hundred forty-three thousand, four hundred twenty-one".