1101551 has 8 divisors (see below), whose sum is σ = 1209600. Its totient is φ = 994840.

The previous prime is 1101533. The next prime is 1101559. The reversal of 1101551 is 1551011.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1101551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2420 + ... + 2838.

It is an arithmetic number, because the mean of its divisors is an integer number (151200).

2^1101551 is an apocalyptic number.

1101551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1101551 is a deficient number, since it is larger than the sum of its proper divisors (108049).

1101551 is a wasteful number, since it uses less digits than its factorization.

1101551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669.

The product of its (nonzero) digits is 25, while the sum is 14.

The square root of 1101551 is about 1049.5479979496. The cubic root of 1101551 is about 103.2765059258.

Adding to 1101551 its reverse (1551011), we get a palindrome (2652562).

It can be divided in two parts, 1101 and 551, that multiplied together give a triangular number (606651 = T₁₁₀₁).

The spelling of 1101551 in words is "one million, one hundred one thousand, five hundred fifty-one".