1261485 has 36 divisors (see below), whose sum is σ = 2346708. Its totient is φ = 626688.

The previous prime is 1261459. The next prime is 1261487. The reversal of 1261485 is 5841621.

It can be written as a sum of positive squares in 6 ways, for example, as 49284 + 1212201 = 222^2 + 1101^2 .

It is not a de Polignac number, because 1261485 - 2⁷ = 1261357 is a prime.

1261485 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261487) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 12957 + ... + 13053.

2^1261485 is an apocalyptic number.

1261485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1261485 is a deficient number, since it is larger than the sum of its proper divisors (1085223).

1261485 is a wasteful number, since it uses less digits than its factorization.

1261485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 122 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 1261485 is about 1123.1584928228. The cubic root of 1261485 is about 108.0506449714.

The spelling of 1261485 in words is "one million, two hundred sixty-one thousand, four hundred eighty-five".