1301139612 has 84 divisors (see below), whose sum is σ = 3478756680. Its totient is φ = 425479392.

The previous prime is 1301139583. The next prime is 1301139613. The reversal of 1301139612 is 2169311031.

1301139612 is a `hidden beast` number, since 1 + 3 + 0 + 11 + 39 + 612 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1301139613) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 150339 + ... + 158757.

It is an arithmetic number, because the mean of its divisors is an integer number (41413770).

Almost surely, 2^1301139612 is an apocalyptic number.

1301139612 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 1301139612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1739378340).

1301139612 is an abundant number, since it is smaller than the sum of its proper divisors (2177617068).

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

1301139612 is an equidigital number, since it uses as much as digits as its factorization.

1301139612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8494 (or 8477 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 1301139612 is about 36071.3128677069. The cubic root of 1301139612 is about 1091.7117038726.

The spelling of 1301139612 in words is "one billion, three hundred one million, one hundred thirty-nine thousand, six hundred twelve".