1601538 has 16 divisors (see below), whose sum is σ = 3217536. Its totient is φ = 531440.

The previous prime is 1601533. The next prime is 1601543. The reversal of 1601538 is 8351061.

It is an interprime number because it is at equal distance from previous prime (1601533) and next prime (1601543).

It is not an unprimeable number, because it can be changed into a prime (1601533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1303 + ... + 2213.

It is an arithmetic number, because the mean of its divisors is an integer number (201096).

2^1601538 is an apocalyptic number.

1601538 is an abundant number, since it is smaller than the sum of its proper divisors (1615998).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1601538 is a wasteful number, since it uses less digits than its factorization.

1601538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1209.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 1601538 is about 1265.5188659202. The cubic root of 1601538 is about 116.9981736876.

Adding to 1601538 its reverse (8351061), we get a palindrome (9952599).

The spelling of 1601538 in words is "one million, six hundred one thousand, five hundred thirty-eight".