1271321562 has 96 divisors (see below), whose sum is σ = 3025797120. Its totient is φ = 354987360.

The previous prime is 1271321551. The next prime is 1271321567. The reversal of 1271321562 is 2651231721.

It is a super-2 number, since 2×1271321562² = 3232517028012239688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1271321567) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2949487 + ... + 2949917.

It is an arithmetic number, because the mean of its divisors is an integer number (31518720).

Almost surely, 2^1271321562 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1271321562, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1512898560).

1271321562 is an abundant number, since it is smaller than the sum of its proper divisors (1754475558).

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

1271321562 is a wasteful number, since it uses less digits than its factorization.

1271321562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656 (or 649 counting only the distinct ones).

The product of its digits is 5040, while the sum is 30.

The square root of 1271321562 is about 35655.5965032139. The cubic root of 1271321562 is about 1083.3076356718.

The spelling of 1271321562 in words is "one billion, two hundred seventy-one million, three hundred twenty-one thousand, five hundred sixty-two".