1269728 has 12 divisors (see below), whose sum is σ = 2499840. Its totient is φ = 634848.

The previous prime is 1269703. The next prime is 1269731. The reversal of 1269728 is 8279621.

It is a happy number.

It is a super-2 number, since 2×1269728² = 3224418387968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19808 + ... + 19871.

It is an arithmetic number, because the mean of its divisors is an integer number (208320).

2^1269728 is an apocalyptic number.

It is an amenable number.

1269728 is a deficient number, since it is larger than the sum of its proper divisors (1230112).

1269728 is an equidigital number, since it uses as much as digits as its factorization.

1269728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39689 (or 39681 counting only the distinct ones).

The product of its digits is 12096, while the sum is 35.

The square root of 1269728 is about 1126.8220800109. The cubic root of 1269728 is about 108.2854815622.

The spelling of 1269728 in words is "one million, two hundred sixty-nine thousand, seven hundred twenty-eight".