1261352268 has 72 divisors (see below), whose sum is σ = 3537293760. Its totient is φ = 375742560.

The previous prime is 1261352231. The next prime is 1261352291. The reversal of 1261352268 is 8622531621.

1261352268 is a `hidden beast` number, since 12 + 61 + 3 + 522 + 68 = 666.

1261352268 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3630 + ... + 50357.

It is an arithmetic number, because the mean of its divisors is an integer number (49129080).

Almost surely, 2^1261352268 is an apocalyptic number.

1261352268 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1261352268, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1768646880).

1261352268 is an abundant number, since it is smaller than the sum of its proper divisors (2275941492).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1261352268 is a wasteful number, since it uses less digits than its factorization.

1261352268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54067 (or 54062 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 1261352268 is about 35515.5215082082. The cubic root of 1261352268 is about 1080.4685518361.

Adding to 1261352268 its reverse (8622531621), we get a palindrome (9883883889).

The spelling of 1261352268 in words is "one billion, two hundred sixty-one million, three hundred fifty-two thousand, two hundred sixty-eight".