1421072616 has 128 divisors (see below), whose sum is σ = 3811248000. Its totient is φ = 440681472.

The previous prime is 1421072603. The next prime is 1421072617. The reversal of 1421072616 is 6162701241.

1421072616 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (1421072617) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3579330 + ... + 3579726.

It is an arithmetic number, because the mean of its divisors is an integer number (29775375).

Almost surely, 2^1421072616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1421072616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1905624000).

1421072616 is an abundant number, since it is smaller than the sum of its proper divisors (2390175384).

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

1421072616 is a wasteful number, since it uses less digits than its factorization.

1421072616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611 (or 607 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 1421072616 is about 37697.1168128280. The cubic root of 1421072616 is about 1124.2738005660.

Adding to 1421072616 its reverse (6162701241), we get a palindrome (7583773857).

The spelling of 1421072616 in words is "one billion, four hundred twenty-one million, seventy-two thousand, six hundred sixteen".