1247164416 has 144 divisors (see below), whose sum is σ = 3656605680. Its totient is φ = 409436160.

The previous prime is 1247164403. The next prime is 1247164447. The reversal of 1247164416 is 6144617421.

It is a happy number.

1247164416 is a `hidden beast` number, since 1 + 2 + 4 + 7 + 1 + 644 + 1 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

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

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, 1308196 + ... + 1309148.

It is an arithmetic number, because the mean of its divisors is an integer number (25393095).

Almost surely, 2^1247164416 is an apocalyptic number.

1247164416 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 1247164416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1828302840).

1247164416 is an abundant number, since it is smaller than the sum of its proper divisors (2409441264).

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

1247164416 is an equidigital number, since it uses as much as digits as its factorization.

1247164416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052 (or 1029 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 1247164416 is about 35315.2150779236. The cubic root of 1247164416 is about 1076.4021842449.

The spelling of 1247164416 in words is "one billion, two hundred forty-seven million, one hundred sixty-four thousand, four hundred sixteen".