1526661 has 8 divisors (see below), whose sum is σ = 2261760. Its totient is φ = 1017756.

The previous prime is 1526659. The next prime is 1526687. The reversal of 1526661 is 1666251.

It is a happy number.

It is not a de Polignac number, because 1526661 - 2¹ = 1526659 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 56543 = 1526661 / (1 + 5 + 2 + 6 + 6 + 6 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1526611) 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, 28245 + ... + 28298.

It is an arithmetic number, because the mean of its divisors is an integer number (282720).

2^1526661 is an apocalyptic number.

It is an amenable number.

1526661 is a deficient number, since it is larger than the sum of its proper divisors (735099).

1526661 is an equidigital number, since it uses as much as digits as its factorization.

1526661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56552 (or 56546 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 1526661 is about 1235.5812397410. The cubic root of 1526661 is about 115.1456503609.

It can be divided in two parts, 1526 and 661, that added together give a 7-th power (2187 = 3⁷).

The spelling of 1526661 in words is "one million, five hundred twenty-six thousand, six hundred sixty-one".