1121655 has 32 divisors (see below), whose sum is σ = 1926144. Its totient is φ = 556416.

The previous prime is 1121651. The next prime is 1121671. The reversal of 1121655 is 5561211.

It is not a de Polignac number, because 1121655 - 2² = 1121651 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121651) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23842 + ... + 23888.

It is an arithmetic number, because the mean of its divisors is an integer number (60192).

2^1121655 is an apocalyptic number.

1121655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1121655 is a deficient number, since it is larger than the sum of its proper divisors (804489).

1121655 is a wasteful number, since it uses less digits than its factorization.

1121655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135.

The product of its digits is 300, while the sum is 21.

The square root of 1121655 is about 1059.0821497882. The cubic root of 1121655 is about 103.9010091106.

Adding to 1121655 its reverse (5561211), we get a palindrome (6682866).

The spelling of 1121655 in words is "one million, one hundred twenty-one thousand, six hundred fifty-five".