1121512455 has 48 divisors (see below), whose sum is σ = 2273356800. Its totient is φ = 500762304.

The previous prime is 1121512433. The next prime is 1121512477. The reversal of 1121512455 is 5542151211.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1121512433) and next prime (1121512477).

It is not a de Polignac number, because 1121512455 - 2⁶ = 1121512391 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27855 + ... + 54944.

It is an arithmetic number, because the mean of its divisors is an integer number (47361600).

Almost surely, 2^1121512455 is an apocalyptic number.

1121512455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1121512455 is an abundant number, since it is smaller than the sum of its proper divisors (1151844345).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1121512455 is a wasteful number, since it uses less digits than its factorization.

1121512455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82860 (or 82857 counting only the distinct ones).

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

The square root of 1121512455 is about 33488.9900564350. The cubic root of 1121512455 is about 1038.9660752046.

Adding to 1121512455 its reverse (5542151211), we get a palindrome (6663663666).

The spelling of 1121512455 in words is "one billion, one hundred twenty-one million, five hundred twelve thousand, four hundred fifty-five".