1276661 has 8 divisors (see below), whose sum is σ = 1361664. Its totient is φ = 1194160.

The previous prime is 1276657. The next prime is 1276679. The reversal of 1276661 is 1666721.

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

It is not a de Polignac number, because 1276661 - 2² = 1276657 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 (1276621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 491 + ... + 1671.

It is an arithmetic number, because the mean of its divisors is an integer number (170208).

2^1276661 is an apocalyptic number.

It is an amenable number.

1276661 is a deficient number, since it is larger than the sum of its proper divisors (85003).

1276661 is a wasteful number, since it uses less digits than its factorization.

1276661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1251.

The product of its digits is 3024, while the sum is 29.

The square root of 1276661 is about 1129.8942428387. The cubic root of 1276661 is about 108.4822116137.

The spelling of 1276661 in words is "one million, two hundred seventy-six thousand, six hundred sixty-one".