1122143240 has 64 divisors (see below), whose sum is σ = 2561414400. Its totient is φ = 442398208.

The previous prime is 1122143233. The next prime is 1122143257. The reversal of 1122143240 is 423412211.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1022372 + ... + 1023468.

It is an arithmetic number, because the mean of its divisors is an integer number (40022100).

Almost surely, 2^1122143240 is an apocalyptic number.

1122143240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1122143240 is an abundant number, since it is smaller than the sum of its proper divisors (1439271160).

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

1122143240 is a wasteful number, since it uses less digits than its factorization.

1122143240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1454 (or 1450 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1122143240 is about 33498.4065292664. The cubic root of 1122143240 is about 1039.1608245312.

Adding to 1122143240 its reverse (423412211), we get a palindrome (1545555451).

The spelling of 1122143240 in words is "one billion, one hundred twenty-two million, one hundred forty-three thousand, two hundred forty".