1211047653 has 16 divisors (see below), whose sum is σ = 1634653440. Its totient is φ = 797423616.

The previous prime is 1211047613. The next prime is 1211047667. The reversal of 1211047653 is 3567401121.

1211047653 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1211047653 - 2¹⁶ = 1210982117 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1211047653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211047613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 323076 + ... + 326802.

It is an arithmetic number, because the mean of its divisors is an integer number (102165840).

Almost surely, 2^1211047653 is an apocalyptic number.

It is an amenable number.

1211047653 is a deficient number, since it is larger than the sum of its proper divisors (423605787).

1211047653 is a wasteful number, since it uses less digits than its factorization.

1211047653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5036.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 1211047653 is about 34800.1099567228. The cubic root of 1211047653 is about 1065.9096911293.

Adding to 1211047653 its reverse (3567401121), we get a palindrome (4778448774).

The spelling of 1211047653 in words is "one billion, two hundred eleven million, forty-seven thousand, six hundred fifty-three".