1546661 has 4 divisors (see below), whose sum is σ = 1549152. Its totient is φ = 1544172.

The previous prime is 1546639. The next prime is 1546663. The reversal of 1546661 is 1666451.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1666451 = 131 ⋅12721.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1546661 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 (1546663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 536 + ... + 1838.

It is an arithmetic number, because the mean of its divisors is an integer number (387288).

2^1546661 is an apocalyptic number.

It is an amenable number.

1546661 is a deficient number, since it is larger than the sum of its proper divisors (2491).

1546661 is a wasteful number, since it uses less digits than its factorization.

1546661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2490.

The product of its digits is 4320, while the sum is 29.

The square root of 1546661 is about 1243.6482621706. The cubic root of 1546661 is about 115.6462917693.

The spelling of 1546661 in words is "one million, five hundred forty-six thousand, six hundred sixty-one".