1641537 has 12 divisors (see below), whose sum is σ = 2510820. Its totient is φ = 1029888.

The previous prime is 1641509. The next prime is 1641539. The reversal of 1641537 is 7351461.

It can be written as a sum of positive squares in 2 ways, for example, as 1252161 + 389376 = 1119^2 + 624^2 .

It is not a de Polignac number, because 1641537 - 2⁶ = 1641473 is a prime.

1641537 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1641537.

It is not an unprimeable number, because it can be changed into a prime (1641539) 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 in 11 ways as a sum of consecutive naturals, for example, 5212 + ... + 5517.

It is an arithmetic number, because the mean of its divisors is an integer number (209235).

2^1641537 is an apocalyptic number.

1641537 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1641537 is a deficient number, since it is larger than the sum of its proper divisors (869283).

1641537 is a wasteful number, since it uses less digits than its factorization.

1641537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10752 (or 10749 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 1641537 is about 1281.2248046303. The cubic root of 1641537 is about 117.9641996154.

Adding to 1641537 its reverse (7351461), we get a palindrome (8992998).

The spelling of 1641537 in words is "one million, six hundred forty-one thousand, five hundred thirty-seven".