1063621 has 4 divisors (see below), whose sum is σ = 1145452. Its totient is φ = 981792.

The previous prime is 1063619. The next prime is 1063627. The reversal of 1063621 is 1263601.

1063621 = T₃₉₈ + T₃₉₉ + ... + T₄₁₀.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1263601 = 461 ⋅2741.

It can be written as a sum of positive squares in 2 ways, for example, as 83521 + 980100 = 289^2 + 990^2 .

It is a cyclic number.

It is not a de Polignac number, because 1063621 - 2¹ = 1063619 is a prime.

It is a super-2 number, since 2×1063621² = 2262579263282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1063627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40896 + ... + 40921.

It is an arithmetic number, because the mean of its divisors is an integer number (286363).

2^1063621 is an apocalyptic number.

It is an amenable number.

1063621 is a deficient number, since it is larger than the sum of its proper divisors (81831).

1063621 is an equidigital number, since it uses as much as digits as its factorization.

1063621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81830.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 1063621 is about 1031.3200279254. The cubic root of 1063621 is about 102.0772514864.

The spelling of 1063621 in words is "one million, sixty-three thousand, six hundred twenty-one".