1421223400 has 24 divisors (see below), whose sum is σ = 3304344870. Its totient is φ = 568489280.

The previous prime is 1421223379. The next prime is 1421223413. The reversal of 1421223400 is 43221241.

It can be written as a sum of positive squares in 3 ways, for example, as 665743204 + 755480196 = 25802^2 + 27486^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3552859 + ... + 3553258.

Almost surely, 2^1421223400 is an apocalyptic number.

1421223400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1421223400 is an abundant number, since it is smaller than the sum of its proper divisors (1883121470).

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

1421223400 is a wasteful number, since it uses less digits than its factorization.

1421223400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7106133 (or 7106124 counting only the distinct ones).

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

The square root of 1421223400 is about 37699.1167005276. The cubic root of 1421223400 is about 1124.3135631377.

Adding to 1421223400 its reverse (43221241), we get a palindrome (1464444641).

The spelling of 1421223400 in words is "one billion, four hundred twenty-one million, two hundred twenty-three thousand, four hundred".