1421015552 has 80 divisors (see below), whose sum is σ = 3115943424. Its totient is φ = 642048000.

The previous prime is 1421015551. The next prime is 1421015579. The reversal of 1421015552 is 2555101241.

It is not an unprimeable number, because it can be changed into a prime (1421015551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1075052 + ... + 1076372.

Almost surely, 2^1421015552 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 1421015552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1557971712).

1421015552 is an abundant number, since it is smaller than the sum of its proper divisors (1694927872).

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

1421015552 is a wasteful number, since it uses less digits than its factorization.

1421015552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1541 (or 1525 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 1421015552 is about 37696.3599303699. The cubic root of 1421015552 is about 1124.2587517411.

Adding to 1421015552 its reverse (2555101241), we get a palindrome (3976116793).

The spelling of 1421015552 in words is "one billion, four hundred twenty-one million, fifteen thousand, five hundred fifty-two".