1297361436 has 72 divisors (see below), whose sum is σ = 3528564480. Its totient is φ = 369921888.

The previous prime is 1297361423. The next prime is 1297361447. The reversal of 1297361436 is 6341637921.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 329085 + ... + 333003.

It is an arithmetic number, because the mean of its divisors is an integer number (49007840).

Almost surely, 2^1297361436 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1297361436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1764282240).

1297361436 is an abundant number, since it is smaller than the sum of its proper divisors (2231203044).

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

1297361436 is a wasteful number, since it uses less digits than its factorization.

1297361436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4503 (or 4494 counting only the distinct ones).

The product of its digits is 163296, while the sum is 42.

The square root of 1297361436 is about 36018.9038700513. The cubic root of 1297361436 is about 1090.6539957655.

The spelling of 1297361436 in words is "one billion, two hundred ninety-seven million, three hundred sixty-one thousand, four hundred thirty-six".