1240320123 has 24 divisors (see below), whose sum is σ = 2049854976. Its totient is φ = 707943600.

The previous prime is 1240320121. The next prime is 1240320131. The reversal of 1240320123 is 3210230421.

It is not a de Polignac number, because 1240320123 - 2¹ = 1240320121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1240320096 and 1240320105.

It is not an unprimeable number, because it can be changed into a prime (1240320121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46588 + ... + 68198.

It is an arithmetic number, because the mean of its divisors is an integer number (85410624).

Almost surely, 2^1240320123 is an apocalyptic number.

1240320123 is a deficient number, since it is larger than the sum of its proper divisors (809534853).

1240320123 is a wasteful number, since it uses less digits than its factorization.

1240320123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22535 (or 22532 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1240320123 is about 35218.1788711455. The cubic root of 1240320123 is about 1074.4295146488.

Adding to 1240320123 its reverse (3210230421), we get a palindrome (4450550544).

The spelling of 1240320123 in words is "one billion, two hundred forty million, three hundred twenty thousand, one hundred twenty-three".