1421205252 has 12 divisors (see below), whose sum is σ = 3316145616. Its totient is φ = 473735080.

The previous prime is 1421205241. The next prime is 1421205271. The reversal of 1421205252 is 2525021241.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59216874 + ... + 59216897.

It is an arithmetic number, because the mean of its divisors is an integer number (276345468).

Almost surely, 2^1421205252 is an apocalyptic number.

1421205252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1421205252 is an abundant number, since it is smaller than the sum of its proper divisors (1894940364).

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

1421205252 is a wasteful number, since it uses less digits than its factorization.

1421205252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118433778 (or 118433776 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 1421205252 is about 37698.8760044646. The cubic root of 1421205252 is about 1124.3087775590.

Adding to 1421205252 its reverse (2525021241), we get a palindrome (3946226493).

The spelling of 1421205252 in words is "one billion, four hundred twenty-one million, two hundred five thousand, two hundred fifty-two".