1261684 has 6 divisors (see below), whose sum is σ = 2207954. Its totient is φ = 630840.

The previous prime is 1261649. The next prime is 1261697. The reversal of 1261684 is 4861621.

It can be written as a sum of positive squares in only one way, i.e., 1232100 + 29584 = 1110^2 + 172^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157707 + ... + 157714.

2^1261684 is an apocalyptic number.

It is an amenable number.

1261684 is a deficient number, since it is larger than the sum of its proper divisors (946270).

1261684 is a wasteful number, since it uses less digits than its factorization.

1261684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315425 (or 315423 counting only the distinct ones).

The product of its digits is 2304, while the sum is 28.

The square root of 1261684 is about 1123.2470787854. The cubic root of 1261684 is about 108.0563263569.

The spelling of 1261684 in words is "one million, two hundred sixty-one thousand, six hundred eighty-four".