1256452134 has 64 divisors (see below), whose sum is σ = 3036966912. Its totient is φ = 338918400.

The previous prime is 1256452123. The next prime is 1256452151. The reversal of 1256452134 is 4312546521.

It is a junction number, because it is equal to n+sod(n) for n = 1256452095 and 1256452104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41614 + ... + 65150.

It is an arithmetic number, because the mean of its divisors is an integer number (47452608).

Almost surely, 2^1256452134 is an apocalyptic number.

1256452134 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1256452134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1518483456).

1256452134 is an abundant number, since it is smaller than the sum of its proper divisors (1780514778).

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

1256452134 is a wasteful number, since it uses less digits than its factorization.

1256452134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23621.

The product of its digits is 28800, while the sum is 33.

The square root of 1256452134 is about 35446.4685688151. The cubic root of 1256452134 is about 1079.0675920223.

Adding to 1256452134 its reverse (4312546521), we get a palindrome (5568998655).

The spelling of 1256452134 in words is "one billion, two hundred fifty-six million, four hundred fifty-two thousand, one hundred thirty-four".