1421605452 has 24 divisors (see below), whose sum is σ = 3363800832. Its totient is φ = 467194000.

The previous prime is 1421605447. The next prime is 1421605477. The reversal of 1421605452 is 2545061241.

It is a super-2 number, since 2×1421605452² = 4041924122312248608, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 833424 + ... + 835127.

It is an arithmetic number, because the mean of its divisors is an integer number (140158368).

Almost surely, 2^1421605452 is an apocalyptic number.

1421605452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1421605452 is an abundant number, since it is smaller than the sum of its proper divisors (1942195380).

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

1421605452 is a wasteful number, since it uses less digits than its factorization.

1421605452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668629 (or 1668627 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 1421605452 is about 37704.1834814122. The cubic root of 1421605452 is about 1124.4142997662.

Adding to 1421605452 its reverse (2545061241), we get a palindrome (3966666693).

The spelling of 1421605452 in words is "one billion, four hundred twenty-one million, six hundred five thousand, four hundred fifty-two".