1305234140 has 24 divisors (see below), whose sum is σ = 3132562272. Its totient is φ = 447508800.

The previous prime is 1305234131. The next prime is 1305234149. The reversal of 1305234140 is 414325031.

It is an interprime number because it is at equal distance from previous prime (1305234131) and next prime (1305234149).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1305234149) 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, 4661411 + ... + 4661690.

It is an arithmetic number, because the mean of its divisors is an integer number (130523428).

Almost surely, 2^1305234140 is an apocalyptic number.

1305234140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1305234140 is an abundant number, since it is smaller than the sum of its proper divisors (1827328132).

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

1305234140 is a wasteful number, since it uses less digits than its factorization.

1305234140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9323117 (or 9323115 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1305234140 is about 36128.0243024719. The cubic root of 1305234140 is about 1092.8556660280.

Adding to 1305234140 its reverse (414325031), we get a palindrome (1719559171).

The spelling of 1305234140 in words is "one billion, three hundred five million, two hundred thirty-four thousand, one hundred forty".