1262220985 has 4 divisors (see below), whose sum is σ = 1514665188. Its totient is φ = 1009776784.

The previous prime is 1262220919. The next prime is 1262220991. The reversal of 1262220985 is 5890222621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 327573801 + 934647184 = 18099^2 + 30572^2 .

It is a cyclic number.

It is not a de Polignac number, because 1262220985 - 2¹⁵ = 1262188217 is a prime.

It is a Duffinian 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, 126222094 + ... + 126222103.

It is an arithmetic number, because the mean of its divisors is an integer number (378666297).

Almost surely, 2^1262220985 is an apocalyptic number.

It is an amenable number.

1262220985 is a deficient number, since it is larger than the sum of its proper divisors (252444203).

1262220985 is an equidigital number, since it uses as much as digits as its factorization.

1262220985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252444202.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 1262220985 is about 35527.7495065477. The cubic root of 1262220985 is about 1080.7165412421.

The spelling of 1262220985 in words is "one billion, two hundred sixty-two million, two hundred twenty thousand, nine hundred eighty-five".