1541661 has 24 divisors (see below), whose sum is σ = 2349312. Its totient is φ = 897600.

The previous prime is 1541651. The next prime is 1541663. The reversal of 1541661 is 1661451.

It is not a de Polignac number, because 1541661 - 2⁵ = 1541629 is a prime.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1541663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11185 + ... + 11321.

It is an arithmetic number, because the mean of its divisors is an integer number (97888).

2^1541661 is an apocalyptic number.

1541661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1541661 is a deficient number, since it is larger than the sum of its proper divisors (807651).

1541661 is a wasteful number, since it uses less digits than its factorization.

1541661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193 (or 182 counting only the distinct ones).

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

The square root of 1541661 is about 1241.6364202133. The cubic root of 1541661 is about 115.5215379336.

The spelling of 1541661 in words is "one million, five hundred forty-one thousand, six hundred sixty-one".