1121551505 has 4 divisors (see below), whose sum is σ = 1345861812. Its totient is φ = 897241200.

The previous prime is 1121551471. The next prime is 1121551531. The reversal of 1121551505 is 5051551211.

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 351600001 + 769951504 = 18751^2 + 27748^2 .

It is not a de Polignac number, because 1121551505 - 2¹⁶ = 1121485969 is a prime.

It is a Duffinian 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, 112155146 + ... + 112155155.

It is an arithmetic number, because the mean of its divisors is an integer number (336465453).

Almost surely, 2^1121551505 is an apocalyptic number.

It is an amenable number.

1121551505 is a deficient number, since it is larger than the sum of its proper divisors (224310307).

1121551505 is an equidigital number, since it uses as much as digits as its factorization.

1121551505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224310306.

The product of its (nonzero) digits is 1250, while the sum is 26.

The square root of 1121551505 is about 33489.5730787957. The cubic root of 1121551505 is about 1038.9781336691.

The spelling of 1121551505 in words is "one billion, one hundred twenty-one million, five hundred fifty-one thousand, five hundred five".