1421330432 has 48 divisors (see below), whose sum is σ = 2918932380. Its totient is φ = 691421184.

The previous prime is 1421330423. The next prime is 1421330437. The reversal of 1421330432 is 2340331241.

It can be written as a sum of positive squares in 2 ways, for example, as 1314497536 + 106832896 = 36256^2 + 10336^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1421330398 and 1421330407.

It is not an unprimeable number, because it can be changed into a prime (1421330437) 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, 66398 + ... + 85154.

Almost surely, 2^1421330432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1421330432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1459466190).

1421330432 is an abundant number, since it is smaller than the sum of its proper divisors (1497601948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1421330432 is an equidigital number, since it uses as much as digits as its factorization.

1421330432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18816 (or 18796 counting only the distinct ones).

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

The square root of 1421330432 is about 37700.5362296082. The cubic root of 1421330432 is about 1124.3417863592.

Adding to 1421330432 its reverse (2340331241), we get a palindrome (3761661673).

The spelling of 1421330432 in words is "one billion, four hundred twenty-one million, three hundred thirty thousand, four hundred thirty-two".