1421200520 has 48 divisors (see below), whose sum is σ = 3239259660. Its totient is φ = 561185664.

The previous prime is 1421200481. The next prime is 1421200537. The reversal of 1421200520 is 250021241.

It can be written as a sum of positive squares in 2 ways, for example, as 1309137124 + 112063396 = 36182^2 + 10586^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 246794 + ... + 252486.

Almost surely, 2^1421200520 is an apocalyptic number.

1421200520 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 1421200520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1619629830).

1421200520 is an abundant number, since it is smaller than the sum of its proper divisors (1818059140).

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

1421200520 is an equidigital number, since it uses as much as digits as its factorization.

1421200520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5862 (or 5779 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 1421200520 is about 37698.8132439206. The cubic root of 1421200520 is about 1124.3075297366.

Adding to 1421200520 its reverse (250021241), we get a palindrome (1671221761).

The spelling of 1421200520 in words is "one billion, four hundred twenty-one million, two hundred thousand, five hundred twenty".