1210449906 has 20 divisors (see below), whose sum is σ = 2712304782. Its totient is φ = 403483248.

The previous prime is 1210449887. The next prime is 1210449907. The reversal of 1210449906 is 6099440121.

It is a happy number.

1210449906 is a `hidden beast` number, since 121 + 0 + 449 + 90 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 681679881 + 528770025 = 26109^2 + 22995^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1210449907) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3735795 + ... + 3736118.

Almost surely, 2^1210449906 is an apocalyptic number.

1210449906 is an abundant number, since it is smaller than the sum of its proper divisors (1501854876).

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

1210449906 is an equidigital number, since it uses as much as digits as its factorization.

1210449906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7471927 (or 7471918 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 1210449906 is about 34791.5206048830. The cubic root of 1210449906 is about 1065.7342922576.

The spelling of 1210449906 in words is "one billion, two hundred ten million, four hundred forty-nine thousand, nine hundred six".