1240426045 has 8 divisors (see below), whose sum is σ = 1516596696. Its totient is φ = 973617216.

The previous prime is 1240426027. The next prime is 1240426049. The reversal of 1240426045 is 5406240421.

It can be written as a sum of positive squares in 4 ways, for example, as 5184729 + 1235241316 = 2277^2 + 35146^2 .

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 1240426045 - 2¹⁵ = 1240393277 is a prime.

It is a super-2 number, since 2×1240426045² = 3077313546228684050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240426049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2340162 + ... + 2340691.

It is an arithmetic number, because the mean of its divisors is an integer number (189574587).

Almost surely, 2^1240426045 is an apocalyptic number.

It is an amenable number.

1240426045 is a deficient number, since it is larger than the sum of its proper divisors (276170651).

1240426045 is an equidigital number, since it uses as much as digits as its factorization.

1240426045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4680911.

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 1240426045 is about 35219.6826362760. The cubic root of 1240426045 is about 1074.4600988185.

Adding to 1240426045 its reverse (5406240421), we get a palindrome (6646666466).

The spelling of 1240426045 in words is "one billion, two hundred forty million, four hundred twenty-six thousand, forty-five".