1200403421 has 24 divisors (see below), whose sum is σ = 1456471296. Its totient is φ = 985340160.

The previous prime is 1200403417. The next prime is 1200403433. The reversal of 1200403421 is 1243040021.

It is not a de Polignac number, because 1200403421 - 2² = 1200403417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1200403421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200403411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 143270 + ... + 151416.

It is an arithmetic number, because the mean of its divisors is an integer number (60686304).

Almost surely, 2^1200403421 is an apocalyptic number.

It is an amenable number.

1200403421 is a deficient number, since it is larger than the sum of its proper divisors (256067875).

1200403421 is an equidigital number, since it uses as much as digits as its factorization.

1200403421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8289 (or 8282 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1200403421 is about 34646.8385426434. The cubic root of 1200403421 is about 1062.7776388357. Note that the first 3 decimals are identical.

Adding to 1200403421 its reverse (1243040021), we get a palindrome (2443443442).

The spelling of 1200403421 in words is "one billion, two hundred million, four hundred three thousand, four hundred twenty-one".