1203402421 has 4 divisors (see below), whose sum is σ = 1295971852. Its totient is φ = 1110832992.

The previous prime is 1203402413. The next prime is 1203402437. The reversal of 1203402421 is 1242043021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 824321521 + 379080900 = 28711^2 + 19470^2 .

It is a cyclic number.

It is not a de Polignac number, because 1203402421 - 2³ = 1203402413 is a prime.

It is a super-2 number, since 2×1203402421² = 2896354773737322482, 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 (1203402121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46284696 + ... + 46284721.

It is an arithmetic number, because the mean of its divisors is an integer number (323992963).

Almost surely, 2^1203402421 is an apocalyptic number.

It is an amenable number.

1203402421 is a deficient number, since it is larger than the sum of its proper divisors (92569431).

1203402421 is an equidigital number, since it uses as much as digits as its factorization.

1203402421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92569430.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1203402421 is about 34690.0911068276. The cubic root of 1203402421 is about 1063.6619580793.

Adding to 1203402421 its reverse (1242043021), we get a palindrome (2445445442).

The spelling of 1203402421 in words is "one billion, two hundred three million, four hundred two thousand, four hundred twenty-one".