1421320450 has 72 divisors (see below), whose sum is σ = 3006409140. Its totient is φ = 498960000.

The previous prime is 1421320447. The next prime is 1421320471. The reversal of 1421320450 is 540231241.

It can be written as a sum of positive squares in 6 ways, for example, as 1053716521 + 367603929 = 32461^2 + 19173^2 .

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 171400 + ... + 179500.

Almost surely, 2^1421320450 is an apocalyptic number.

1421320450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1421320450 is an abundant number, since it is smaller than the sum of its proper divisors (1585088690).

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

1421320450 is a wasteful number, since it uses less digits than its factorization.

1421320450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8164 (or 8148 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1421320450 is about 37700.4038439908. The cubic root of 1421320450 is about 1124.3391542699.

Adding to 1421320450 its reverse (540231241), we get a palindrome (1961551691).

The spelling of 1421320450 in words is "one billion, four hundred twenty-one million, three hundred twenty thousand, four hundred fifty".