1022641 has 4 divisors (see below), whose sum is σ = 1025892. Its totient is φ = 1019392.

The previous prime is 1022639. The next prime is 1022653. The reversal of 1022641 is 1462201.

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 250000 + 772641 = 500^2 + 879^2 .

It is a cyclic number.

It is not a de Polignac number, because 1022641 - 2¹ = 1022639 is a prime.

It is a super-2 number, since 2×1022641² = 2091589229762, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

1022641 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1022611) 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, 1096 + ... + 1801.

It is an arithmetic number, because the mean of its divisors is an integer number (256473).

2^1022641 is an apocalyptic number.

It is an amenable number.

1022641 is a deficient number, since it is larger than the sum of its proper divisors (3251).

1022641 is an equidigital number, since it uses as much as digits as its factorization.

1022641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3250.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1022641 is about 1011.2571384173. The cubic root of 1022641 is about 100.7490748580.

Adding to 1022641 its reverse (1462201), we get a palindrome (2484842).

The spelling of 1022641 in words is "one million, twenty-two thousand, six hundred forty-one".