1263251341 has 4 divisors (see below), whose sum is σ = 1378092384. Its totient is φ = 1148410300.

The previous prime is 1263251329. The next prime is 1263251389. The reversal of 1263251341 is 1431523621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1263251341 - 2¹⁷ = 1263120269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263251441) 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, 57420505 + ... + 57420526.

It is an arithmetic number, because the mean of its divisors is an integer number (344523096).

Almost surely, 2^1263251341 is an apocalyptic number.

1263251341 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1263251341 is a deficient number, since it is larger than the sum of its proper divisors (114841043).

1263251341 is a wasteful number, since it uses less digits than its factorization.

1263251341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114841042.

The product of its digits is 4320, while the sum is 28.

The square root of 1263251341 is about 35542.2472699744. The cubic root of 1263251341 is about 1081.0105256638.

Adding to 1263251341 its reverse (1431523621), we get a palindrome (2694774962).

The spelling of 1263251341 in words is "one billion, two hundred sixty-three million, two hundred fifty-one thousand, three hundred forty-one".