1223534140 has 24 divisors (see below), whose sum is σ = 2581607952. Its totient is φ = 487092480.

The previous prime is 1223534131. The next prime is 1223534159. The reversal of 1223534140 is 414353221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140749 + ... + 149188.

It is an arithmetic number, because the mean of its divisors is an integer number (107566998).

Almost surely, 2^1223534140 is an apocalyptic number.

1223534140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223534140 is an abundant number, since it is smaller than the sum of its proper divisors (1358073812).

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

1223534140 is a wasteful number, since it uses less digits than its factorization.

1223534140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290157 (or 290155 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 1223534140 is about 34979.0528745419. The cubic root of 1223534140 is about 1069.5605205982.

Adding to 1223534140 its reverse (414353221), we get a palindrome (1637887361).

The spelling of 1223534140 in words is "one billion, two hundred twenty-three million, five hundred thirty-four thousand, one hundred forty".