1211498964 has 96 divisors (see below), whose sum is σ = 3529693440. Its totient is φ = 356552064.

The previous prime is 1211498933. The next prime is 1211498969. The reversal of 1211498964 is 4698941121.

It is a happy number.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211498969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13534 + ... + 51050.

It is an arithmetic number, because the mean of its divisors is an integer number (36767640).

Almost surely, 2^1211498964 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 1211498964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1764846720).

1211498964 is an abundant number, since it is smaller than the sum of its proper divisors (2318194476).

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

1211498964 is a wasteful number, since it uses less digits than its factorization.

1211498964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37566 (or 37558 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 1211498964 is about 34806.5936856797. The cubic root of 1211498964 is about 1066.0420825682.

The spelling of 1211498964 in words is "one billion, two hundred eleven million, four hundred ninety-eight thousand, nine hundred sixty-four".