1213497000 has 192 divisors, whose sum is σ = 4142595600. Its totient is φ = 320371200.

The previous prime is 1213496993. The next prime is 1213497011. The reversal of 1213497000 is 7943121.

It can be written as a sum of positive squares in 8 ways, for example, as 197290116 + 1016206884 = 14046^2 + 31878^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 980382 + ... + 981618.

Almost surely, 2^1213497000 is an apocalyptic number.

1213497000 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 1213497000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2071297800).

1213497000 is an abundant number, since it is smaller than the sum of its proper divisors (2929098600).

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

1213497000 is a wasteful number, since it uses less digits than its factorization.

1213497000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1373 (or 1356 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 1213497000 is about 34835.2838369375. The cubic root of 1213497000 is about 1066.6278089143.

The spelling of 1213497000 in words is "one billion, two hundred thirteen million, four hundred ninety-seven thousand".