1213498902 has 64 divisors (see below), whose sum is σ = 3077222400. Its totient is φ = 309845280.

The previous prime is 1213498901. The next prime is 1213498943. The reversal of 1213498902 is 2098943121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213498901) 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, 4999 + ... + 49517.

It is an arithmetic number, because the mean of its divisors is an integer number (48081600).

Almost surely, 2^1213498902 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1213498902, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1538611200).

1213498902 is an abundant number, since it is smaller than the sum of its proper divisors (1863723498).

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

1213498902 is a wasteful number, since it uses less digits than its factorization.

1213498902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44601.

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 1213498902 is about 34835.3111368336. The cubic root of 1213498902 is about 1066.6283661812.

The spelling of 1213498902 in words is "one billion, two hundred thirteen million, four hundred ninety-eight thousand, nine hundred two".