1102645 has 4 divisors (see below), whose sum is σ = 1323180. Its totient is φ = 882112.

The previous prime is 1102583. The next prime is 1102663. The reversal of 1102645 is 5462011.

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 224676 + 877969 = 474^2 + 937^2 .

It is a cyclic number.

It is not a de Polignac number, because 1102645 - 2¹³ = 1094453 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110260 + ... + 110269.

It is an arithmetic number, because the mean of its divisors is an integer number (330795).

2^1102645 is an apocalyptic number.

It is an amenable number.

1102645 is a deficient number, since it is larger than the sum of its proper divisors (220535).

1102645 is an equidigital number, since it uses as much as digits as its factorization.

1102645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220534.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1102645 is about 1050.0690453489. The cubic root of 1102645 is about 103.3106841330.

Adding to 1102645 its reverse (5462011), we get a palindrome (6564656).

The spelling of 1102645 in words is "one million, one hundred two thousand, six hundred forty-five".