1601501 has 16 divisors (see below), whose sum is σ = 1850688. Its totient is φ = 1372800.

The previous prime is 1601489. The next prime is 1601503. The reversal of 1601501 is 1051061.

It is not a de Polignac number, because 1601501 - 2¹⁸ = 1339357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23870 + ... + 23936.

It is an arithmetic number, because the mean of its divisors is an integer number (115668).

2^1601501 is an apocalyptic number.

1601501 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1601501 is a deficient number, since it is larger than the sum of its proper divisors (249187).

1601501 is a wasteful number, since it uses less digits than its factorization.

1601501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172.

The product of its (nonzero) digits is 30, while the sum is 14.

The square root of 1601501 is about 1265.5042473259. The cubic root of 1601501 is about 116.9972726858.

Adding to 1601501 its reverse (1051061), we get a palindrome (2652562).

It can be divided in two parts, 160 and 1501, that added together give a palindrome (1661).

The spelling of 1601501 in words is "one million, six hundred one thousand, five hundred one".