1662553 has 2 divisors, whose sum is σ = 1662554. Its totient is φ = 1662552.

The previous prime is 1662547. The next prime is 1662559. The reversal of 1662553 is 3552661.

It is a balanced prime because it is at equal distance from previous prime (1662547) and next prime (1662559).

It can be written as a sum of positive squares in only one way, i.e., 1065024 + 597529 = 1032^2 + 773^2 .

It is a cyclic number.

It is not a de Polignac number, because 1662553 - 2⁹ = 1662041 is a prime.

It is not a weakly prime, because it can be changed into another prime (1662559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831276 + 831277.

It is an arithmetic number, because the mean of its divisors is an integer number (831277).

2^1662553 is an apocalyptic number.

It is an amenable number.

1662553 is a deficient number, since it is larger than the sum of its proper divisors (1).

1662553 is an equidigital number, since it uses as much as digits as its factorization.

1662553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5400, while the sum is 28.

The square root of 1662553 is about 1289.4002481774. The cubic root of 1662553 is about 118.4654839624.

The spelling of 1662553 in words is "one million, six hundred sixty-two thousand, five hundred fifty-three".