1121157450 has 240 divisors, whose sum is σ = 3616804224. Its totient is φ = 252201600.

The previous prime is 1121157437. The next prime is 1121157451. The reversal of 1121157450 is 547511211.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1121157451) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 2012572 + ... + 2013128.

Almost surely, 2^1121157450 is an apocalyptic number.

1121157450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1121157450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1808402112).

1121157450 is an abundant number, since it is smaller than the sum of its proper divisors (2495646774).

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

1121157450 is a wasteful number, since it uses less digits than its factorization.

1121157450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659 (or 645 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 27.

The square root of 1121157450 is about 33483.6893128580. The cubic root of 1121157450 is about 1038.8564384148.

Adding to 1121157450 its reverse (547511211), we get a palindrome (1668668661).

The spelling of 1121157450 in words is "one billion, one hundred twenty-one million, one hundred fifty-seven thousand, four hundred fifty".