1263812061 has 24 divisors (see below), whose sum is σ = 1748474400. Its totient is φ = 811956960.

The previous prime is 1263812041. The next prime is 1263812063. The reversal of 1263812061 is 1602183621.

It is not a de Polignac number, because 1263812061 - 2¹³ = 1263803869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263812063) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 815115 + ... + 816663.

It is an arithmetic number, because the mean of its divisors is an integer number (72853100).

Almost surely, 2^1263812061 is an apocalyptic number.

It is an amenable number.

1263812061 is a deficient number, since it is larger than the sum of its proper divisors (484662339).

1263812061 is a wasteful number, since it uses less digits than its factorization.

1263812061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1897 (or 1866 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 1263812061 is about 35550.1344723195. The cubic root of 1263812061 is about 1081.1704448979.

Adding to 1263812061 its reverse (1602183621), we get a palindrome (2865995682).

The spelling of 1263812061 in words is "one billion, two hundred sixty-three million, eight hundred twelve thousand, sixty-one".