1210001994 has 24 divisors (see below), whose sum is σ = 2627914692. Its totient is φ = 402373440.

The previous prime is 1210001987. The next prime is 1210002019. The reversal of 1210001994 is 4991000121.

It can be written as a sum of positive squares in 2 ways, for example, as 670136769 + 539865225 = 25887^2 + 23235^2 .

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 11 ways as a sum of consecutive naturals, for example, 72259 + ... + 87414.

Almost surely, 2^1210001994 is an apocalyptic number.

1210001994 is an abundant number, since it is smaller than the sum of its proper divisors (1417912698).

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

1210001994 is a wasteful number, since it uses less digits than its factorization.

1210001994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160102 (or 160099 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 1210001994 is about 34785.0829235752. The cubic root of 1210001994 is about 1065.6028221136.

The spelling of 1210001994 in words is "one billion, two hundred ten million, one thousand, nine hundred ninety-four".