1240345459 has 2 divisors, whose sum is σ = 1240345460. Its totient is φ = 1240345458.

The previous prime is 1240345429. The next prime is 1240345481. The reversal of 1240345459 is 9545430421.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1240345459 - 2⁵ = 1240345427 is a prime.

It is not a weakly prime, because it can be changed into another prime (1240345429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620172729 + 620172730.

It is an arithmetic number, because the mean of its divisors is an integer number (620172730).

Almost surely, 2^1240345459 is an apocalyptic number.

1240345459 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240345459 is an equidigital number, since it uses as much as digits as its factorization.

1240345459 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 1240345459 is about 35218.5385699066. The cubic root of 1240345459 is about 1074.4368303840.

The spelling of 1240345459 in words is "one billion, two hundred forty million, three hundred forty-five thousand, four hundred fifty-nine".