1243220153 has 8 divisors (see below), whose sum is σ = 1440835200. Its totient is φ = 1050608160.

The previous prime is 1243220123. The next prime is 1243220159. The reversal of 1243220153 is 3510223421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1243220153 - 2⁶ = 1243220089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1243220159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1250228 + ... + 1251221.

It is an arithmetic number, because the mean of its divisors is an integer number (180104400).

Almost surely, 2^1243220153 is an apocalyptic number.

It is an amenable number.

1243220153 is a deficient number, since it is larger than the sum of its proper divisors (197615047).

1243220153 is an equidigital number, since it uses as much as digits as its factorization.

1243220153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2501527.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1243220153 is about 35259.3271773583. The cubic root of 1243220153 is about 1075.2662482400.

Adding to 1243220153 its reverse (3510223421), we get a palindrome (4753443574).

The spelling of 1243220153 in words is "one billion, two hundred forty-three million, two hundred twenty thousand, one hundred fifty-three".