1261406 has 8 divisors (see below), whose sum is σ = 1938384. Its totient is φ = 615280.

The previous prime is 1261387. The next prime is 1261411. The reversal of 1261406 is 6041621.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1261406² = 3182290193672, which contains 22 as substring.

It is a Curzon number.

It is a congruent 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, 7610 + ... + 7773.

It is an arithmetic number, because the mean of its divisors is an integer number (242298).

2^1261406 is an apocalyptic number.

1261406 is a deficient number, since it is larger than the sum of its proper divisors (676978).

1261406 is a wasteful number, since it uses less digits than its factorization.

1261406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15426.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1261406 is about 1123.1233235936. The cubic root of 1261406 is about 108.0483893813.

The spelling of 1261406 in words is "one million, two hundred sixty-one thousand, four hundred six".