1421231700 has 144 divisors (see below), whose sum is σ = 4809136640. Its totient is φ = 317278080.

The previous prime is 1421231687. The next prime is 1421231717. The reversal of 1421231700 is 71321241.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 82431 + ... + 98169.

Almost surely, 2^1421231700 is an apocalyptic number.

1421231700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1421231700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2404568320).

1421231700 is an abundant number, since it is smaller than the sum of its proper divisors (3387904940).

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

1421231700 is a wasteful number, since it uses less digits than its factorization.

1421231700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15806 (or 15799 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 1421231700 is about 37699.2267825217. The cubic root of 1421231700 is about 1124.3157518118.

Adding to 1421231700 its reverse (71321241), we get a palindrome (1492552941).

The spelling of 1421231700 in words is "one billion, four hundred twenty-one million, two hundred thirty-one thousand, seven hundred".