1230633561 has 16 divisors (see below), whose sum is σ = 1713945600. Its totient is φ = 783945360.

The previous prime is 1230633559. The next prime is 1230633563. The reversal of 1230633561 is 1653360321.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1230633559) and next prime (1230633563).

It is not a de Polignac number, because 1230633561 - 2¹ = 1230633559 is a prime.

It is a super-2 number, since 2×1230633561² = 3028917922919081442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1230633563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62490 + ... + 79788.

It is an arithmetic number, because the mean of its divisors is an integer number (107121600).

Almost surely, 2^1230633561 is an apocalyptic number.

It is an amenable number.

1230633561 is a deficient number, since it is larger than the sum of its proper divisors (483312039).

1230633561 is a wasteful number, since it uses less digits than its factorization.

1230633561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18356.

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 1230633561 is about 35080.3871272824. The cubic root of 1230633561 is about 1071.6252010956.

Adding to 1230633561 its reverse (1653360321), we get a palindrome (2883993882).

The spelling of 1230633561 in words is "one billion, two hundred thirty million, six hundred thirty-three thousand, five hundred sixty-one".