1213302461 has 16 divisors (see below), whose sum is σ = 1486794240. Its totient is φ = 966401280.

The previous prime is 1213302449. The next prime is 1213302473. The reversal of 1213302461 is 1642033121.

It is an interprime number because it is at equal distance from previous prime (1213302449) and next prime (1213302473).

It is a cyclic number.

It is not a de Polignac number, because 1213302461 - 2¹⁸ = 1213040317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213302421) 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, 55130 + ... + 73931.

It is an arithmetic number, because the mean of its divisors is an integer number (92924640).

Almost surely, 2^1213302461 is an apocalyptic number.

It is an amenable number.

1213302461 is a deficient number, since it is larger than the sum of its proper divisors (273491779).

1213302461 is a wasteful number, since it uses less digits than its factorization.

1213302461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129164.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1213302461 is about 34832.4914555362. The cubic root of 1213302461 is about 1066.5708078679.

Adding to 1213302461 its reverse (1642033121), we get a palindrome (2855335582).

The spelling of 1213302461 in words is "one billion, two hundred thirteen million, three hundred two thousand, four hundred sixty-one".