1210861372 has 12 divisors (see below), whose sum is σ = 2421722800. Its totient is φ = 518940576.

The previous prime is 1210861343. The next prime is 1210861403. The reversal of 1210861372 is 2731680121.

1210861372 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21622497 + ... + 21622552.

Almost surely, 2^1210861372 is an apocalyptic number.

It is an amenable number.

1210861372 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1210861372 is a wasteful number, since it uses less digits than its factorization.

1210861372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43245060 (or 43245058 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 1210861372 is about 34797.4334111009. The cubic root of 1210861372 is about 1065.8550362735.

The spelling of 1210861372 in words is "one billion, two hundred ten million, eight hundred sixty-one thousand, three hundred seventy-two".