1421353220 has 48 divisors (see below), whose sum is σ = 3528887040. Its totient is φ = 470515584.

The previous prime is 1421353207. The next prime is 1421353267. The reversal of 1421353220 is 223531241.

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, 170984 + ... + 179103.

It is an arithmetic number, because the mean of its divisors is an integer number (73518480).

Almost surely, 2^1421353220 is an apocalyptic number.

1421353220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1421353220 is an abundant number, since it is smaller than the sum of its proper divisors (2107533820).

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

1421353220 is a wasteful number, since it uses less digits than its factorization.

1421353220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350132 (or 350130 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1421353220 is about 37700.8384522148. The cubic root of 1421353220 is about 1124.3477951341.

Adding to 1421353220 its reverse (223531241), we get a palindrome (1644884461).

The spelling of 1421353220 in words is "one billion, four hundred twenty-one million, three hundred fifty-three thousand, two hundred twenty".