5253661 has 8 divisors (see below), whose sum is σ = 6020864. Its totient is φ = 4490640.

The previous prime is 5253649. The next prime is 5253679. The reversal of 5253661 is 1663525.

5253661 is a nontrivial binomial coefficient, being equal to C(3242, 2).

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

It is a de Polignac number, because none of the positive numbers 2^k-5253661 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 (5253631) 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, 2431 + ... + 4051.

It is an arithmetic number, because the mean of its divisors is an integer number (752608).

Almost surely, 2^5253661 is an apocalyptic number.

5253661 is the 3241-st triangular number and also the 1621-st hexagonal number.

5253661 is the 1081-st centered nonagonal number.

It is an amenable number.

5253661 is a deficient number, since it is larger than the sum of its proper divisors (767203).

5253661 is a wasteful number, since it uses less digits than its factorization.

5253661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2091.

The product of its digits is 5400, while the sum is 28.

The square root of 5253661 is about 2292.0866039485. The cubic root of 5253661 is about 173.8417220115.

It can be divided in two parts, 525 and 3661, that added together give a triangular number (4186 = T₉₁).

The spelling of 5253661 in words is "five million, two hundred fifty-three thousand, six hundred sixty-one".