1421003431 has 4 divisors (see below), whose sum is σ = 1422263200. Its totient is φ = 1419743664.

The previous prime is 1421003399. The next prime is 1421003447. The reversal of 1421003431 is 1343001241.

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

It is a cyclic number.

It is not a de Polignac number, because 1421003431 - 2⁵ = 1421003399 is a prime.

It is a super-2 number, since 2×1421003431² = 4038501501827543522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1421003399 and 1421003408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421003471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 628191 + ... + 630448.

It is an arithmetic number, because the mean of its divisors is an integer number (355565800).

Almost surely, 2^1421003431 is an apocalyptic number.

1421003431 is a deficient number, since it is larger than the sum of its proper divisors (1259769).

1421003431 is a wasteful number, since it uses less digits than its factorization.

1421003431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259768.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1421003431 is about 37696.1991585359. The cubic root of 1421003431 is about 1124.2555551589.

Adding to 1421003431 its reverse (1343001241), we get a palindrome (2764004672).

The spelling of 1421003431 in words is "one billion, four hundred twenty-one million, three thousand, four hundred thirty-one".