1240123433 has 8 divisors (see below), whose sum is σ = 1314177480. Its totient is φ = 1168155520.

The previous prime is 1240123403. The next prime is 1240123457. The reversal of 1240123433 is 3343210421.

It can be written as a sum of positive squares in 4 ways, for example, as 35200489 + 1204922944 = 5933^2 + 34712^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1240123433 - 2¹² = 1240119337 is a prime.

It is a super-2 number, since 2×1240123433² = 3075812258151410978, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1240123399 and 1240123408.

It is not an unprimeable number, because it can be changed into a prime (1240123403) 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, 520310 + ... + 522687.

It is an arithmetic number, because the mean of its divisors is an integer number (164272185).

Almost surely, 2^1240123433 is an apocalyptic number.

It is an amenable number.

1240123433 is a deficient number, since it is larger than the sum of its proper divisors (74054047).

1240123433 is a wasteful number, since it uses less digits than its factorization.

1240123433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043067.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 1240123433 is about 35215.3863105319. The cubic root of 1240123433 is about 1074.3727172922.

Adding to 1240123433 its reverse (3343210421), we get a palindrome (4583333854).

The spelling of 1240123433 in words is "one billion, two hundred forty million, one hundred twenty-three thousand, four hundred thirty-three".