1256313126 has 16 divisors (see below), whose sum is σ = 2518012224. Its totient is φ = 417873384.

The previous prime is 1256313109. The next prime is 1256313143. The reversal of 1256313126 is 6213136521.

It is an interprime number because it is at equal distance from previous prime (1256313109) and next prime (1256313143).

It is a junction number, because it is equal to n+sod(n) for n = 1256313093 and 1256313102.

It is a congruent 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, 221380 + ... + 226983.

It is an arithmetic number, because the mean of its divisors is an integer number (157375764).

Almost surely, 2^1256313126 is an apocalyptic number.

1256313126 is an abundant number, since it is smaller than the sum of its proper divisors (1261699098).

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

1256313126 is a wasteful number, since it uses less digits than its factorization.

1256313126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448835.

The product of its digits is 6480, while the sum is 30.

The square root of 1256313126 is about 35444.5076986548. The cubic root of 1256313126 is about 1079.0277962206.

Adding to 1256313126 its reverse (6213136521), we get a palindrome (7469449647).

The spelling of 1256313126 in words is "one billion, two hundred fifty-six million, three hundred thirteen thousand, one hundred twenty-six".