1121251554 has 12 divisors (see below), whose sum is σ = 2429378406. Its totient is φ = 373750512.

The previous prime is 1121251529. The next prime is 1121251561. The reversal of 1121251554 is 4551521211.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 963171225 + 158080329 = 31035^2 + 12573^2 .

It is a super-3 number, since 3×1121251554³ (a number of 28 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31145859 + ... + 31145894.

Almost surely, 2^1121251554 is an apocalyptic number.

1121251554 is an abundant number, since it is smaller than the sum of its proper divisors (1308126852).

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

1121251554 is a wasteful number, since it uses less digits than its factorization.

1121251554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62291761 (or 62291758 counting only the distinct ones).

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

The square root of 1121251554 is about 33485.0945048689. The cubic root of 1121251554 is about 1038.8855029650.

Adding to 1121251554 its reverse (4551521211), we get a palindrome (5672772765).

The spelling of 1121251554 in words is "one billion, one hundred twenty-one million, two hundred fifty-one thousand, five hundred fifty-four".