3105240705 has 160 divisors (see below), whose sum is σ = 6657361920. Its totient is φ = 1354890240.

The previous prime is 3105240703. The next prime is 3105240707. The reversal of 3105240705 is 5070425013.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3105240703) and next prime (3105240707).

It is not a de Polignac number, because 3105240705 - 2¹ = 3105240703 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (3105240701) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 7821567 + ... + 7821963.

It is an arithmetic number, because the mean of its divisors is an integer number (41608512).

Almost surely, 2^3105240705 is an apocalyptic number.

3105240705 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3105240705 is an abundant number, since it is smaller than the sum of its proper divisors (3552121215).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3105240705 is a wasteful number, since it uses less digits than its factorization.

3105240705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541 (or 532 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 3105240705 is about 55724.6866747584. The cubic root of 3105240705 is about 1458.9209367428.

Adding to 3105240705 its reverse (5070425013), we get a palindrome (8175665718).

The spelling of 3105240705 in words is "three billion, one hundred five million, two hundred forty thousand, seven hundred five".