1601602 has 4 divisors (see below), whose sum is σ = 2402406. Its totient is φ = 800800.

The previous prime is 1601599. The next prime is 1601609. The reversal of 1601602 is 2061061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2061061 = 419 ⋅4919.

It can be written as a sum of positive squares in only one way, i.e., 1442401 + 159201 = 1201^2 + 399^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1601609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400399 + ... + 400402.

2^1601602 is an apocalyptic number.

1601602 is a deficient number, since it is larger than the sum of its proper divisors (800804).

1601602 is an equidigital number, since it uses as much as digits as its factorization.

1601602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800803.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1601602 is about 1265.5441517387. The cubic root of 1601602 is about 116.9997321444. Note that the first 3 decimals are identical.

Adding to 1601602 its reverse (2061061), we get a palindrome (3662663).

The spelling of 1601602 in words is "one million, six hundred one thousand, six hundred two".