1264278 has 8 divisors (see below), whose sum is σ = 2528568. Its totient is φ = 421424.

The previous prime is 1264271. The next prime is 1264301. The reversal of 1264278 is 8724621.

It is a sphenic number, since it is the product of 3 distinct primes.

1264278 is an admirable number.

It is a super-2 number, since 2×1264278² = 3196797722568, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105351 + ... + 105362.

It is an arithmetic number, because the mean of its divisors is an integer number (316071).

2^1264278 is an apocalyptic number.

1264278 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1264278 is a wasteful number, since it uses less digits than its factorization.

1264278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210718.

The product of its digits is 5376, while the sum is 30.

The square root of 1264278 is about 1124.4011739588. The cubic root of 1264278 is about 108.1303296291.

Adding to 1264278 its reverse (8724621), we get a palindrome (9988899).

It can be divided in two parts, 12642 and 78, that added together give a triangular number (12720 = T₁₅₉).

The spelling of 1264278 in words is "one million, two hundred sixty-four thousand, two hundred seventy-eight".