1261485028 has 12 divisors (see below), whose sum is σ = 2212585200. Its totient is φ = 629317832.

The previous prime is 1261485019. The next prime is 1261485037. The reversal of 1261485028 is 8205841621.

It is an interprime number because it is at equal distance from previous prime (1261485019) and next prime (1261485037).

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, 354178 + ... + 357721.

It is an arithmetic number, because the mean of its divisors is an integer number (184382100).

Almost surely, 2^1261485028 is an apocalyptic number.

It is an amenable number.

1261485028 is a deficient number, since it is larger than the sum of its proper divisors (951100172).

1261485028 is a wasteful number, since it uses less digits than its factorization.

1261485028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712346 (or 712344 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 37.

The square root of 1261485028 is about 35517.3905009926. The cubic root of 1261485028 is about 1080.5064577080.

The spelling of 1261485028 in words is "one billion, two hundred sixty-one million, four hundred eighty-five thousand, twenty-eight".