1602661 has 2 divisors, whose sum is σ = 1602662. Its totient is φ = 1602660.

The previous prime is 1602637. The next prime is 1602677. The reversal of 1602661 is 1662061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1454436 + 148225 = 1206^2 + 385^2 .

It is a cyclic number.

It is not a de Polignac number, because 1602661 - 2¹⁹ = 1078373 is a prime.

1602661 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1602611) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 801330 + 801331.

It is an arithmetic number, because the mean of its divisors is an integer number (801331).

2^1602661 is an apocalyptic number.

It is an amenable number.

1602661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1602661 is an equidigital number, since it uses as much as digits as its factorization.

1602661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1602661 is about 1265.9624796968. The cubic root of 1602661 is about 117.0255137093.

The spelling of 1602661 in words is "one million, six hundred two thousand, six hundred sixty-one".