1261332104 has 8 divisors (see below), whose sum is σ = 2364997710. Its totient is φ = 630666048.

The previous prime is 1261332073. The next prime is 1261332173. The reversal of 1261332104 is 4012331621.

It can be written as a sum of positive squares in only one way, i.e., 907816900 + 353515204 = 30130^2 + 18802^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1261332104.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78833249 + ... + 78833264.

Almost surely, 2^1261332104 is an apocalyptic number.

It is an amenable number.

1261332104 is a deficient number, since it is larger than the sum of its proper divisors (1103665606).

1261332104 is a wasteful number, since it uses less digits than its factorization.

1261332104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157666519 (or 157666515 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1261332104 is about 35515.2376311915. The cubic root of 1261332104 is about 1080.4627943422.

Adding to 1261332104 its reverse (4012331621), we get a palindrome (5273663725).

The spelling of 1261332104 in words is "one billion, two hundred sixty-one million, three hundred thirty-two thousand, one hundred four".