1269864 has 32 divisors (see below), whose sum is σ = 3528000. Its totient is φ = 423216.

The previous prime is 1269859. The next prime is 1269869. The reversal of 1269864 is 4689621.

It is an interprime number because it is at equal distance from previous prime (1269859) and next prime (1269869).

It is a super-2 number, since 2×1269864² = 3225109156992, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1269869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2724 + ... + 3155.

It is an arithmetic number, because the mean of its divisors is an integer number (110250).

2^1269864 is an apocalyptic number.

It is an amenable number.

1269864 is an abundant number, since it is smaller than the sum of its proper divisors (2258136).

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

1269864 is a wasteful number, since it uses less digits than its factorization.

1269864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5894 (or 5884 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 1269864 is about 1126.8824251003. The cubic root of 1269864 is about 108.2893475607.

The spelling of 1269864 in words is "one million, two hundred sixty-nine thousand, eight hundred sixty-four".