1264987 has 4 divisors (see below), whose sum is σ = 1339416. Its totient is φ = 1190560.

The previous prime is 1264981. The next prime is 1264997. The reversal of 1264987 is 7894621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7894621 = 7 ⋅1127803.

It is a cyclic number.

It is not a de Polignac number, because 1264987 - 2³ = 1264979 is a prime.

It is a super-2 number, since 2×1264987² = 3200384220338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1264981) 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, 37189 + ... + 37222.

It is an arithmetic number, because the mean of its divisors is an integer number (334854).

2^1264987 is an apocalyptic number.

1264987 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1264987 is a deficient number, since it is larger than the sum of its proper divisors (74429).

1264987 is an equidigital number, since it uses as much as digits as its factorization.

1264987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74428.

The product of its digits is 24192, while the sum is 37.

The square root of 1264987 is about 1124.7164087004. The cubic root of 1264987 is about 108.1505388124.

The spelling of 1264987 in words is "one million, two hundred sixty-four thousand, nine hundred eighty-seven".