1263965053 has 4 divisors (see below), whose sum is σ = 1361193148. Its totient is φ = 1166736960.

The previous prime is 1263965047. The next prime is 1263965057. The reversal of 1263965053 is 3505693621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3505693621 = 31 ⋅113086891.

It can be written as a sum of positive squares in 2 ways, for example, as 760546084 + 503418969 = 27578^2 + 22437^2 .

It is a cyclic number.

It is not a de Polignac number, because 1263965053 - 2¹³ = 1263956861 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1263964997 and 1263965015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263965057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48614028 + ... + 48614053.

It is an arithmetic number, because the mean of its divisors is an integer number (340298287).

Almost surely, 2^1263965053 is an apocalyptic number.

1263965053 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1263965053 is a deficient number, since it is larger than the sum of its proper divisors (97228095).

1263965053 is an equidigital number, since it uses as much as digits as its factorization.

1263965053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97228094.

The product of its (nonzero) digits is 145800, while the sum is 40.

The square root of 1263965053 is about 35552.2861852793. The cubic root of 1263965053 is about 1081.2140705180.

The spelling of 1263965053 in words is "one billion, two hundred sixty-three million, nine hundred sixty-five thousand, fifty-three".