1261677364 has 12 divisors (see below), whose sum is σ = 2284071300. Its totient is φ = 609085568.

The previous prime is 1261677343. The next prime is 1261677433. The reversal of 1261677364 is 4637761621.

It can be written as a sum of positive squares in 2 ways, for example, as 311804964 + 949872400 = 17658^2 + 30820^2 .

It is a super-3 number, since 3×1261677364³ (a number of 28 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1261677364.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5438149 + ... + 5438380.

It is an arithmetic number, because the mean of its divisors is an integer number (190339275).

Almost surely, 2^1261677364 is an apocalyptic number.

It is an amenable number.

1261677364 is a deficient number, since it is larger than the sum of its proper divisors (1022393936).

1261677364 is a wasteful number, since it uses less digits than its factorization.

1261677364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10876562 (or 10876560 counting only the distinct ones).

The product of its digits is 254016, while the sum is 43.

The square root of 1261677364 is about 35520.0980291440. The cubic root of 1261677364 is about 1080.5613691086.

The spelling of 1261677364 in words is "one billion, two hundred sixty-one million, six hundred seventy-seven thousand, three hundred sixty-four".