1200343421 has 8 divisors (see below), whose sum is σ = 1229635584. Its totient is φ = 1171361520.

The previous prime is 1200343393. The next prime is 1200343423. The reversal of 1200343421 is 1243430021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1200343421 - 2¹⁰ = 1200342397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200343393 and 1200343402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200343423) 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, 69725 + ... + 85218.

It is an arithmetic number, because the mean of its divisors is an integer number (153704448).

Almost surely, 2^1200343421 is an apocalyptic number.

It is an amenable number.

1200343421 is a deficient number, since it is larger than the sum of its proper divisors (29292163).

1200343421 is a wasteful number, since it uses less digits than its factorization.

1200343421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155131.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1200343421 is about 34645.9726519548. The cubic root of 1200343421 is about 1062.7599315328.

Adding to 1200343421 its reverse (1243430021), we get a palindrome (2443773442).

The spelling of 1200343421 in words is "one billion, two hundred million, three hundred forty-three thousand, four hundred twenty-one".