1256340130 has 16 divisors (see below), whose sum is σ = 2265439104. Its totient is φ = 501641200.

The previous prime is 1256340121. The next prime is 1256340139. The reversal of 1256340130 is 310436521.

It is an interprime number because it is at equal distance from previous prime (1256340121) and next prime (1256340139).

It is a junction number, because it is equal to n+sod(n) for n = 1256340095 and 1256340104.

It is not an unprimeable number, because it can be changed into a prime (1256340139) 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, 105946 + ... + 117205.

It is an arithmetic number, because the mean of its divisors is an integer number (141589944).

Almost surely, 2^1256340130 is an apocalyptic number.

1256340130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1256340130 is a deficient number, since it is larger than the sum of its proper divisors (1009098974).

1256340130 is a wasteful number, since it uses less digits than its factorization.

1256340130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223721.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 1256340130 is about 35444.8886300973. Note that the first 3 decimals coincide. The cubic root of 1256340130 is about 1079.0355272703.

Adding to 1256340130 its reverse (310436521), we get a palindrome (1566776651).

The spelling of 1256340130 in words is "one billion, two hundred fifty-six million, three hundred forty thousand, one hundred thirty".