1240105345 has 8 divisors (see below), whose sum is σ = 1510337664. Its totient is φ = 977276784.

The previous prime is 1240105331. The next prime is 1240105351. The reversal of 1240105345 is 5435010421.

It is a happy number.

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 1240105345 - 2¹³ = 1240097153 is a prime.

It is a super-2 number, since 2×1240105345² = 3075722533395138050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1850569 + ... + 1851238.

It is an arithmetic number, because the mean of its divisors is an integer number (188792208).

Almost surely, 2^1240105345 is an apocalyptic number.

It is an amenable number.

1240105345 is a deficient number, since it is larger than the sum of its proper divisors (270232319).

1240105345 is an equidigital number, since it uses as much as digits as its factorization.

1240105345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3701879.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1240105345 is about 35215.1294900360. The cubic root of 1240105345 is about 1074.3674937938.

Adding to 1240105345 its reverse (5435010421), we get a palindrome (6675115766).

The spelling of 1240105345 in words is "one billion, two hundred forty million, one hundred five thousand, three hundred forty-five".