1156243200 has 324 divisors, whose sum is σ = 4442450040. Its totient is φ = 264069120.

The previous prime is 1156243169. The next prime is 1156243247. The reversal of 1156243200 is 23426511.

It is a super-5 number, since 5×1156243200⁵ (a number of 47 digits) contains 55555 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 940186 + ... + 941414.

Almost surely, 2^1156243200 is an apocalyptic number.

1156243200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1156243200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2221225020).

1156243200 is an abundant number, since it is smaller than the sum of its proper divisors (3286206840).

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

1156243200 is a wasteful number, since it uses less digits than its factorization.

1156243200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272 (or 1246 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1156243200 is about 34003.5762825030. The cubic root of 1156243200 is about 1049.5820558850.

Adding to 1156243200 its reverse (23426511), we get a palindrome (1179669711).

The spelling of 1156243200 in words is "one billion, one hundred fifty-six million, two hundred forty-three thousand, two hundred".