1407661 has 2 divisors, whose sum is σ = 1407662. Its totient is φ = 1407660.

The previous prime is 1407647. The next prime is 1407667. The reversal of 1407661 is 1667041.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1232100 + 175561 = 1110^2 + 419^2 .

It is a cyclic number.

It is not a de Polignac number, because 1407661 - 2⁵ = 1407629 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1407667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 703830 + 703831.

It is an arithmetic number, because the mean of its divisors is an integer number (703831).

2^1407661 is an apocalyptic number.

It is an amenable number.

1407661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1407661 is an equidigital number, since it uses as much as digits as its factorization.

1407661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 1407661 is about 1186.4489032403. The cubic root of 1407661 is about 112.0725773211.

The spelling of 1407661 in words is "one million, four hundred seven thousand, six hundred sixty-one".