1455661 has 2 divisors, whose sum is σ = 1455662. Its totient is φ = 1455660.

The previous prime is 1455653. The next prime is 1455673. The reversal of 1455661 is 1665541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1454436 + 1225 = 1206^2 + 35^2 .

It is a cyclic number.

It is not a de Polignac number, because 1455661 - 2³ = 1455653 is a prime.

1455661 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1455361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 727830 + 727831.

It is an arithmetic number, because the mean of its divisors is an integer number (727831).

2^1455661 is an apocalyptic number.

It is an amenable number.

1455661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1455661 is an equidigital number, since it uses as much as digits as its factorization.

1455661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 28.

The square root of 1455661 is about 1206.5077703853. The cubic root of 1455661 is about 113.3322250949.

It can be divided in two parts, 1455 and 661, that added together give a square (2116 = 46²).

The spelling of 1455661 in words is "one million, four hundred fifty-five thousand, six hundred sixty-one".