1400256 has 168 divisors, whose sum is σ = 4992624. Its totient is φ = 368640.

The previous prime is 1400251. The next prime is 1400261. The reversal of 1400256 is 6520041.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1400251) and next prime (1400261).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400251) 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, 82360 + ... + 82376.

It is an arithmetic number, because the mean of its divisors is an integer number (29718).

2^1400256 is an apocalyptic number.

1400256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1400256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2496312).

1400256 is an abundant number, since it is smaller than the sum of its proper divisors (3592368).

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

1400256 is a wasteful number, since it uses less digits than its factorization.

1400256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59 (or 46 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1400256 is about 1183.3241314196. The cubic root of 1400256 is about 111.8757124680.

Adding to 1400256 its reverse (6520041), we get a palindrome (7920297).

The spelling of 1400256 in words is "one million, four hundred thousand, two hundred fifty-six".