1297050440 has 128 divisors (see below), whose sum is σ = 3406233600. Its totient is φ = 435352320.

The previous prime is 1297050437. The next prime is 1297050463. The reversal of 1297050440 is 440507921.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1297050397 and 1297050406.

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, 4224767 + ... + 4225073.

It is an arithmetic number, because the mean of its divisors is an integer number (26611200).

Almost surely, 2^1297050440 is an apocalyptic number.

1297050440 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 1297050440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1703116800).

1297050440 is an abundant number, since it is smaller than the sum of its proper divisors (2109183160).

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

1297050440 is a wasteful number, since it uses less digits than its factorization.

1297050440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595 (or 591 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 1297050440 is about 36014.5864893657. The cubic root of 1297050440 is about 1090.5668403728.

The spelling of 1297050440 in words is "one billion, two hundred ninety-seven million, fifty thousand, four hundred forty".