1012661 has 8 divisors (see below), whose sum is σ = 1109304. Its totient is φ = 918720.

The previous prime is 1012657. The next prime is 1012663. The reversal of 1012661 is 1662101.

1012661 = T₂₆₆ + T₂₆₇ + ... + T₂₉₁.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 625 + 1012036 = 25^2 + 1006^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1012661 - 2² = 1012657 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 (1012663) 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, 155 + ... + 1431.

It is an arithmetic number, because the mean of its divisors is an integer number (138663).

2^1012661 is an apocalyptic number.

It is an amenable number.

1012661 is a deficient number, since it is larger than the sum of its proper divisors (96643).

1012661 is a wasteful number, since it uses less digits than its factorization.

1012661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1351.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1012661 is about 1006.3105882380. The cubic root of 1012661 is about 100.4202646354.

Adding to 1012661 its reverse (1662101), we get a palindrome (2674762).

The spelling of 1012661 in words is "one million, twelve thousand, six hundred sixty-one".