1243506264 has 256 divisors, whose sum is σ = 4211343360. Its totient is φ = 295488000.

The previous prime is 1243506223. The next prime is 1243506269. The reversal of 1243506264 is 4626053421.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243506269) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4588449 + ... + 4588719.

It is an arithmetic number, because the mean of its divisors is an integer number (16450560).

Almost surely, 2^1243506264 is an apocalyptic number.

1243506264 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1243506264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2105671680).

1243506264 is an abundant number, since it is smaller than the sum of its proper divisors (2967837096).

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

1243506264 is a wasteful number, since it uses less digits than its factorization.

1243506264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502 (or 498 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 1243506264 is about 35263.3841824633. The cubic root of 1243506264 is about 1075.3487281085.

Adding to 1243506264 its reverse (4626053421), we get a palindrome (5869559685).

The spelling of 1243506264 in words is "one billion, two hundred forty-three million, five hundred six thousand, two hundred sixty-four".