1256742 has 48 divisors (see below), whose sum is σ = 3039120. Its totient is φ = 383616.

The previous prime is 1256737. The next prime is 1256747. The reversal of 1256742 is 2476521.

It is an interprime number because it is at equal distance from previous prime (1256737) and next prime (1256747).

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

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256747) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33948 + ... + 33984.

It is an arithmetic number, because the mean of its divisors is an integer number (63315).

2^1256742 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1256742, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1519560).

1256742 is an abundant number, since it is smaller than the sum of its proper divisors (1782378).

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

1256742 is a wasteful number, since it uses less digits than its factorization.

1256742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102 (or 59 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 1256742 is about 1121.0450481582. The cubic root of 1256742 is about 107.9150566653.

The spelling of 1256742 in words is "one million, two hundred fifty-six thousand, seven hundred forty-two".