1223502140 has 48 divisors (see below), whose sum is σ = 2938478592. Its totient is φ = 419190336.

The previous prime is 1223502139. The next prime is 1223502149. The reversal of 1223502140 is 412053221.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223502149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 306437 + ... + 310403.

It is an arithmetic number, because the mean of its divisors is an integer number (61218304).

Almost surely, 2^1223502140 is an apocalyptic number.

1223502140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223502140 is an abundant number, since it is smaller than the sum of its proper divisors (1714976452).

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

1223502140 is a wasteful number, since it uses less digits than its factorization.

1223502140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6186 (or 6184 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1223502140 is about 34978.5954549350. The cubic root of 1223502140 is about 1069.5511961792.

Adding to 1223502140 its reverse (412053221), we get a palindrome (1635555361).

The spelling of 1223502140 in words is "one billion, two hundred twenty-three million, five hundred two thousand, one hundred forty".