1263525155 has 8 divisors (see below), whose sum is σ = 1517089392. Its totient is φ = 1010247328.

The previous prime is 1263525149. The next prime is 1263525169. The reversal of 1263525155 is 5515253621.

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

It is a cyclic number.

It is not a de Polignac number, because 1263525155 - 2¹⁰ = 1263524131 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61772 + ... + 79641.

It is an arithmetic number, because the mean of its divisors is an integer number (189636174).

Almost surely, 2^1263525155 is an apocalyptic number.

1263525155 is a deficient number, since it is larger than the sum of its proper divisors (253564237).

1263525155 is a wasteful number, since it uses less digits than its factorization.

1263525155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143205.

The product of its digits is 45000, while the sum is 35.

The square root of 1263525155 is about 35546.0990124092. The cubic root of 1263525155 is about 1081.0886242504.

Adding to 1263525155 its reverse (5515253621), we get a palindrome (6778778776).

The spelling of 1263525155 in words is "one billion, two hundred sixty-three million, five hundred twenty-five thousand, one hundred fifty-five".