1297945350 has 144 divisors (see below), whose sum is σ = 3873524400. Its totient is φ = 319438080.

The previous prime is 1297945349. The next prime is 1297945357. The reversal of 1297945350 is 535497921.

It is a happy number.

1297945350 is a `hidden beast` number, since 1 + 29 + 7 + 94 + 535 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 1297945296 and 1297945305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297945357) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 225306 + ... + 230994.

It is an arithmetic number, because the mean of its divisors is an integer number (26899475).

Almost surely, 2^1297945350 is an apocalyptic number.

1297945350 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1297945350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1936762200).

1297945350 is an abundant number, since it is smaller than the sum of its proper divisors (2575579050).

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

1297945350 is a wasteful number, since it uses less digits than its factorization.

1297945350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5736 (or 5712 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 45.

The square root of 1297945350 is about 36027.0086185351. The cubic root of 1297945350 is about 1090.8175977245.

The spelling of 1297945350 in words is "one billion, two hundred ninety-seven million, nine hundred forty-five thousand, three hundred fifty".