1260985 has 16 divisors (see below), whose sum is σ = 1674432. Its totient is φ = 904000.

The previous prime is 1260979. The next prime is 1260989. The reversal of 1260985 is 5890621.

It is not a de Polignac number, because 1260985 - 2⁹ = 1260473 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1260989) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 5442 + ... + 5668.

It is an arithmetic number, because the mean of its divisors is an integer number (104652).

2^1260985 is an apocalyptic number.

It is an amenable number.

1260985 is a deficient number, since it is larger than the sum of its proper divisors (413447).

1260985 is a wasteful number, since it uses less digits than its factorization.

1260985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 1260985 is about 1122.9358841893. The cubic root of 1260985 is about 108.0363674963.

It can be divided in two parts, 1260 and 985, that multiplied together give a triangular number (1241100 = T₁₅₇₅).

The spelling of 1260985 in words is "one million, two hundred sixty thousand, nine hundred eighty-five".