1421801208 has 64 divisors (see below), whose sum is σ = 3953836800. Its totient is φ = 473407200.

The previous prime is 1421801167. The next prime is 1421801233. The reversal of 1421801208 is 8021081241.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 223885 + ... + 230147.

It is an arithmetic number, because the mean of its divisors is an integer number (61778700).

Almost surely, 2^1421801208 is an apocalyptic number.

1421801208 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1421801208 is an abundant number, since it is smaller than the sum of its proper divisors (2532035592).

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

1421801208 is a wasteful number, since it uses less digits than its factorization.

1421801208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7329 (or 7319 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 27.

The square root of 1421801208 is about 37706.7793374083. The cubic root of 1421801208 is about 1124.4659082588.

Adding to 1421801208 its reverse (8021081241), we get a palindrome (9442882449).

The spelling of 1421801208 in words is "one billion, four hundred twenty-one million, eight hundred one thousand, two hundred eight".