1264400 has 60 divisors (see below), whose sum is σ = 3171300. Its totient is φ = 483840.

The previous prime is 1264387. The next prime is 1264411. The reversal of 1264400 is 44621.

It can be written as a sum of positive squares in 6 ways, for example, as 1024 + 1263376 = 32^2 + 1124^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11546 + ... + 11654.

It is an arithmetic number, because the mean of its divisors is an integer number (52855).

2^1264400 is an apocalyptic number.

1264400 is a gapful number since it is divisible by the number (10) 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 1264400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1585650).

1264400 is an abundant number, since it is smaller than the sum of its proper divisors (1906900).

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

1264400 is a wasteful number, since it uses less digits than its factorization.

1264400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156 (or 145 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1264400 is about 1124.4554237496. The cubic root of 1264400 is about 108.1338076289.

The spelling of 1264400 in words is "one million, two hundred sixty-four thousand, four hundred".