1261332004 has 6 divisors (see below), whose sum is σ = 2207331014. Its totient is φ = 630666000.

The previous prime is 1261331989. The next prime is 1261332013. The reversal of 1261332004 is 4002331621.

It can be written as a sum of positive squares in only one way, i.e., 841000000 + 420332004 = 29000^2 + 20502^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157666497 + ... + 157666504.

Almost surely, 2^1261332004 is an apocalyptic number.

It is an amenable number.

1261332004 is a deficient number, since it is larger than the sum of its proper divisors (945999010).

1261332004 is a wasteful number, since it uses less digits than its factorization.

1261332004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315333005 (or 315333003 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 1261332004 is about 35515.2362233450. The cubic root of 1261332004 is about 1080.4627657887.

Adding to 1261332004 its reverse (4002331621), we get a palindrome (5263663625).

The spelling of 1261332004 in words is "one billion, two hundred sixty-one million, three hundred thirty-two thousand, four".