1276400 has 30 divisors (see below), whose sum is σ = 3067512. Its totient is φ = 510400.

The previous prime is 1276397. The next prime is 1276409. The reversal of 1276400 is 46721.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1276409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1196 + ... + 1995.

2^1276400 is an apocalyptic number.

1276400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1276400 is an abundant number, since it is smaller than the sum of its proper divisors (1791112).

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

1276400 is a wasteful number, since it uses less digits than its factorization.

1276400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3209 (or 3198 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 1276400 is about 1129.7787393999. The cubic root of 1276400 is about 108.4748184250.

The spelling of 1276400 in words is "one million, two hundred seventy-six thousand, four hundred".