1421577216 has 264 divisors, whose sum is σ = 4425941520. Its totient is φ = 455196672.

The previous prime is 1421577197. The next prime is 1421577221. The reversal of 1421577216 is 6127751241.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7216030 + ... + 7216226.

It is an arithmetic number, because the mean of its divisors is an integer number (16764930).

Almost surely, 2^1421577216 is an apocalyptic number.

1421577216 is a gapful number since it is divisible by the number (16) 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 1421577216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2212970760).

1421577216 is an abundant number, since it is smaller than the sum of its proper divisors (3004364304).

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

1421577216 is an equidigital number, since it uses as much as digits as its factorization.

1421577216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261 (or 231 counting only the distinct ones).

The product of its digits is 23520, while the sum is 36.

The square root of 1421577216 is about 37703.8090383452. The cubic root of 1421577216 is about 1124.4068553255.

The spelling of 1421577216 in words is "one billion, four hundred twenty-one million, five hundred seventy-seven thousand, two hundred sixteen".