1661413 has 8 divisors (see below), whose sum is σ = 1800288. Its totient is φ = 1524144.

The previous prime is 1661353. The next prime is 1661431. The reversal of 1661413 is 3141661.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1661413 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 (1661713) 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, 2670 + ... + 3232.

It is an arithmetic number, because the mean of its divisors is an integer number (225036).

2^1661413 is an apocalyptic number.

1661413 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1661413 is a deficient number, since it is larger than the sum of its proper divisors (138875).

1661413 is a wasteful number, since it uses less digits than its factorization.

1661413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803.

The product of its digits is 432, while the sum is 22.

The square root of 1661413 is about 1288.9581063789. The cubic root of 1661413 is about 118.4384008095.

The spelling of 1661413 in words is "one million, six hundred sixty-one thousand, four hundred thirteen".