1321423430 has 32 divisors (see below), whose sum is σ = 2520564480. Its totient is φ = 497064960.

The previous prime is 1321423429. The next prime is 1321423487. The reversal of 1321423430 is 343241231.

It is a junction number, because it is equal to n+sod(n) for n = 1321423396 and 1321423405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 271115 + ... + 275945.

It is an arithmetic number, because the mean of its divisors is an integer number (78767640).

Almost surely, 2^1321423430 is an apocalyptic number.

1321423430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321423430 is a deficient number, since it is larger than the sum of its proper divisors (1199141050).

1321423430 is a wasteful number, since it uses less digits than its factorization.

1321423430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6464.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 1321423430 is about 36351.3882816049. The cubic root of 1321423430 is about 1097.3554737968.

Adding to 1321423430 its reverse (343241231), we get a palindrome (1664664661).

The spelling of 1321423430 in words is "one billion, three hundred twenty-one million, four hundred twenty-three thousand, four hundred thirty".