1263504253 has 8 divisors (see below), whose sum is σ = 1393856640. Its totient is φ = 1135733280.

The previous prime is 1263504251. The next prime is 1263504299. The reversal of 1263504253 is 3524053621.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1263504253 - 2¹ = 1263504251 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263504251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 644325 + ... + 646282.

It is an arithmetic number, because the mean of its divisors is an integer number (174232080).

Almost surely, 2^1263504253 is an apocalyptic number.

It is an amenable number.

1263504253 is a deficient number, since it is larger than the sum of its proper divisors (130352387).

1263504253 is a wasteful number, since it uses less digits than its factorization.

1263504253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1290707.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 1263504253 is about 35545.8049986211. The cubic root of 1263504253 is about 1081.0826628761.

Adding to 1263504253 its reverse (3524053621), we get a palindrome (4787557874).

The spelling of 1263504253 in words is "one billion, two hundred sixty-three million, five hundred four thousand, two hundred fifty-three".