1207661 has 16 divisors (see below), whose sum is σ = 1553664. Its totient is φ = 912384.

The previous prime is 1207649. The next prime is 1207681. The reversal of 1207661 is 1667021.

It is a cyclic number.

It is not a de Polignac number, because 1207661 - 2⁶ = 1207597 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is an Ulam number.

It is a zygodrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1207681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1805 + ... + 2381.

It is an arithmetic number, because the mean of its divisors is an integer number (97104).

2^1207661 is an apocalyptic number.

It is an amenable number.

1207661 is a deficient number, since it is larger than the sum of its proper divisors (346003).

1207661 is a wasteful number, since it uses less digits than its factorization.

1207661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 1207661 is about 1098.9363038866. The cubic root of 1207661 is about 106.4915170273.

The spelling of 1207661 in words is "one million, two hundred seven thousand, six hundred sixty-one".