1652561 has 4 divisors (see below), whose sum is σ = 1658724. Its totient is φ = 1646400.

The previous prime is 1652543. The next prime is 1652569.

1652561 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1254400 + 398161 = 1120^2 + 631^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1652561 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 1652561.

It is not an unprimeable number, because it can be changed into a prime (1652569) 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, 2660 + ... + 3221.

It is an arithmetic number, because the mean of its divisors is an integer number (414681).

2^1652561 is an apocalyptic number.

It is an amenable number.

1652561 is a deficient number, since it is larger than the sum of its proper divisors (6163).

1652561 is an equidigital number, since it uses as much as digits as its factorization.

1652561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6162.

The product of its digits is 1800, while the sum is 26.

The square root of 1652561 is about 1285.5197392495. The cubic root of 1652561 is about 118.2276797263.

The spelling of 1652561 in words is "one million, six hundred fifty-two thousand, five hundred sixty-one".