1243130511 has 16 divisors (see below), whose sum is σ = 1895148288. Its totient is φ = 710040000.

The previous prime is 1243130509. The next prime is 1243130521. The reversal of 1243130511 is 1150313421.

It is not a de Polignac number, because 1243130511 - 2¹ = 1243130509 is a prime.

It is a super-2 number, since 2×1243130511² = 3090746934758242242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243130521) 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, 39136 + ... + 63386.

It is an arithmetic number, because the mean of its divisors is an integer number (118446768).

Almost surely, 2^1243130511 is an apocalyptic number.

1243130511 is a deficient number, since it is larger than the sum of its proper divisors (652017777).

1243130511 is a wasteful number, since it uses less digits than its factorization.

1243130511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26702.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1243130511 is about 35258.0559730681. The cubic root of 1243130511 is about 1075.2404037067.

Adding to 1243130511 its reverse (1150313421), we get a palindrome (2393443932).

The spelling of 1243130511 in words is "one billion, two hundred forty-three million, one hundred thirty thousand, five hundred eleven".