1263952915 has 4 divisors (see below), whose sum is σ = 1516743504. Its totient is φ = 1011162328.

The previous prime is 1263952913. The next prime is 1263952931. The reversal of 1263952915 is 5192593621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5192593621 = 97 ⋅53531893.

It is a cyclic number.

It is not a de Polignac number, because 1263952915 - 2¹ = 1263952913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1263952913) 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, 126395287 + ... + 126395296.

It is an arithmetic number, because the mean of its divisors is an integer number (379185876).

Almost surely, 2^1263952915 is an apocalyptic number.

1263952915 is a deficient number, since it is larger than the sum of its proper divisors (252790589).

1263952915 is an equidigital number, since it uses as much as digits as its factorization.

1263952915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252790588.

The product of its digits is 145800, while the sum is 43.

The square root of 1263952915 is about 35552.1154785478. The cubic root of 1263952915 is about 1081.2106094998.

The spelling of 1263952915 in words is "one billion, two hundred sixty-three million, nine hundred fifty-two thousand, nine hundred fifteen".