1261420612 has 6 divisors (see below), whose sum is σ = 2207486078. Its totient is φ = 630710304.

The previous prime is 1261420607. The next prime is 1261420679. The reversal of 1261420612 is 2160241621.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1032079876 + 229340736 = 32126^2 + 15144^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157677573 + ... + 157677580.

Almost surely, 2^1261420612 is an apocalyptic number.

It is an amenable number.

1261420612 is a deficient number, since it is larger than the sum of its proper divisors (946065466).

1261420612 is a wasteful number, since it uses less digits than its factorization.

1261420612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315355157 (or 315355155 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 1261420612 is about 35516.4836660388. The cubic root of 1261420612 is about 1080.4880658690.

The spelling of 1261420612 in words is "one billion, two hundred sixty-one million, four hundred twenty thousand, six hundred twelve".