1421307552 has 192 divisors, whose sum is σ = 4415330304. Its totient is φ = 391910400.

The previous prime is 1421307541. The next prime is 1421307611. The reversal of 1421307552 is 2557031241.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2918253 + ... + 2918739.

It is an arithmetic number, because the mean of its divisors is an integer number (22996512).

Almost surely, 2^1421307552 is an apocalyptic number.

1421307552 is a gapful number since it is divisible by the number (12) 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 1421307552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2207665152).

1421307552 is an abundant number, since it is smaller than the sum of its proper divisors (2994022752).

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

1421307552 is a wasteful number, since it uses less digits than its factorization.

1421307552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651 (or 643 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 1421307552 is about 37700.2327844272. The cubic root of 1421307552 is about 1124.3357532610.

Adding to 1421307552 its reverse (2557031241), we get a palindrome (3978338793).

The spelling of 1421307552 in words is "one billion, four hundred twenty-one million, three hundred seven thousand, five hundred fifty-two".