1121452551 has 24 divisors (see below), whose sum is σ = 1637990016. Its totient is φ = 739322640.

The previous prime is 1121452547. The next prime is 1121452603. The reversal of 1121452551 is 1552541211.

It is a happy number.

It is not a de Polignac number, because 1121452551 - 2² = 1121452547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121452511) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 307726 + ... + 311348.

It is an arithmetic number, because the mean of its divisors is an integer number (68249584).

Almost surely, 2^1121452551 is an apocalyptic number.

1121452551 is a deficient number, since it is larger than the sum of its proper divisors (516537465).

1121452551 is a wasteful number, since it uses less digits than its factorization.

1121452551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4003 (or 4000 counting only the distinct ones).

The product of its digits is 2000, while the sum is 27.

The square root of 1121452551 is about 33488.0956609957. The cubic root of 1121452551 is about 1038.9475765745.

Adding to 1121452551 its reverse (1552541211), we get a palindrome (2673993762).

The spelling of 1121452551 in words is "one billion, one hundred twenty-one million, four hundred fifty-two thousand, five hundred fifty-one".