1247211360 has 72 divisors (see below), whose sum is σ = 4256113680. Its totient is φ = 332589312.

The previous prime is 1247211293. The next prime is 1247211419. The reversal of 1247211360 is 631127421.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 431620 + ... + 434499.

It is an arithmetic number, because the mean of its divisors is an integer number (59112690).

Almost surely, 2^1247211360 is an apocalyptic number.

1247211360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1247211360 is an abundant number, since it is smaller than the sum of its proper divisors (3008902320).

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

1247211360 is a wasteful number, since it uses less digits than its factorization.

1247211360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866140 (or 866129 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 1247211360 is about 35315.8797143721. The cubic root of 1247211360 is about 1076.4156895453.

Adding to 1247211360 its reverse (631127421), we get a palindrome (1878338781).

It can be divided in two parts, 12472 and 11360, that added together give a palindrome (23832).

The spelling of 1247211360 in words is "one billion, two hundred forty-seven million, two hundred eleven thousand, three hundred sixty".