1626541 has 4 divisors (see below), whose sum is σ = 1858912. Its totient is φ = 1394172.

The previous prime is 1626503. The next prime is 1626589. The reversal of 1626541 is 1456261.

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 an emirpimes, since its reverse is a distinct semiprime: 1456261 = 97 ⋅15013.

It is a cyclic number.

It is not a de Polignac number, because 1626541 - 2¹⁵ = 1593773 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 (1621541) 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 3 ways as a sum of consecutive naturals, for example, 116175 + ... + 116188.

It is an arithmetic number, because the mean of its divisors is an integer number (464728).

2^1626541 is an apocalyptic number.

It is an amenable number.

1626541 is a deficient number, since it is larger than the sum of its proper divisors (232371).

1626541 is an equidigital number, since it uses as much as digits as its factorization.

1626541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232370.

The product of its digits is 1440, while the sum is 25.

The square root of 1626541 is about 1275.3591650982. The cubic root of 1626541 is about 117.6038857910.

The spelling of 1626541 in words is "one million, six hundred twenty-six thousand, five hundred forty-one".