1296706740 has 96 divisors (see below), whose sum is σ = 4157497344. Its totient is φ = 295816320.

The previous prime is 1296706721. The next prime is 1296706769. The reversal of 1296706740 is 476076921.

It is a super-2 number, since 2×1296706740² = 3362896739122855200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 1296706692 and 1296706701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 237117 + ... + 242523.

It is an arithmetic number, because the mean of its divisors is an integer number (43307264).

Almost surely, 2^1296706740 is an apocalyptic number.

1296706740 is a gapful number since it is divisible by the number (10) 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 1296706740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2078748672).

1296706740 is an abundant number, since it is smaller than the sum of its proper divisors (2860790604).

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

1296706740 is a wasteful number, since it uses less digits than its factorization.

1296706740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5997 (or 5995 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 42.

The square root of 1296706740 is about 36009.8144954955. The cubic root of 1296706740 is about 1090.4705036063.

The spelling of 1296706740 in words is "one billion, two hundred ninety-six million, seven hundred six thousand, seven hundred forty".