1601243 has 16 divisors (see below), whose sum is σ = 1941504. Its totient is φ = 1291680.

The previous prime is 1601239. The next prime is 1601261. The reversal of 1601243 is 3421061.

It is a cyclic number.

It is not a de Polignac number, because 1601243 - 2² = 1601239 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1601203) 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 in 15 ways as a sum of consecutive naturals, for example, 10121 + ... + 10277.

It is an arithmetic number, because the mean of its divisors is an integer number (121344).

2^1601243 is an apocalyptic number.

1601243 is a deficient number, since it is larger than the sum of its proper divisors (340261).

1601243 is a wasteful number, since it uses less digits than its factorization.

1601243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1601243 is about 1265.4023075686. The cubic root of 1601243 is about 116.9909896390.

Multiplying 1601243 by its sum of digits (17), we get a triangular number (27221131 = T₇₃₇₈).

The spelling of 1601243 in words is "one million, six hundred one thousand, two hundred forty-three".