1123215 has 16 divisors (see below), whose sum is σ = 1817088. Its totient is φ = 592416.

The previous prime is 1123211. The next prime is 1123217. The reversal of 1123215 is 5123211.

It is not a de Polignac number, because 1123215 - 2² = 1123211 is a prime.

It is a super-2 number, since 2×1123215² = 2523223872450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 1123194 and 1123203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1182 + ... + 1908.

It is an arithmetic number, because the mean of its divisors is an integer number (113568).

2^1123215 is an apocalyptic number.

1123215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1123215 is a deficient number, since it is larger than the sum of its proper divisors (693873).

1123215 is a wasteful number, since it uses less digits than its factorization.

1123215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838.

The product of its digits is 60, while the sum is 15.

The square root of 1123215 is about 1059.8183806672. The cubic root of 1123215 is about 103.9491553734.

Adding to 1123215 its reverse (5123211), we get a palindrome (6246426).

The spelling of 1123215 in words is "one million, one hundred twenty-three thousand, two hundred fifteen".