1358661 has 8 divisors (see below), whose sum is σ = 1817344. Its totient is φ = 902880.

The previous prime is 1358647. The next prime is 1358689. The reversal of 1358661 is 1668531.

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

It is not a de Polignac number, because 1358661 - 2¹³ = 1350469 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 (1358611) 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 7 ways as a sum of consecutive naturals, for example, 876 + ... + 1866.

It is an arithmetic number, because the mean of its divisors is an integer number (227168).

2^1358661 is an apocalyptic number.

It is an amenable number.

1358661 is a deficient number, since it is larger than the sum of its proper divisors (458683).

1358661 is an equidigital number, since it uses as much as digits as its factorization.

1358661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1451.

The product of its digits is 4320, while the sum is 30.

The square root of 1358661 is about 1165.6161460790. The cubic root of 1358661 is about 110.7567923993.

The spelling of 1358661 in words is "one million, three hundred fifty-eight thousand, six hundred sixty-one".