1267820 has 12 divisors (see below), whose sum is σ = 2662464. Its totient is φ = 507120.

The previous prime is 1267789. The next prime is 1267823. The reversal of 1267820 is 287621.

It is a self number, because there is not a number n which added to its sum of digits gives 1267820.

It is not an unprimeable number, because it can be changed into a prime (1267823) 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, 31676 + ... + 31715.

It is an arithmetic number, because the mean of its divisors is an integer number (221872).

2^1267820 is an apocalyptic number.

1267820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1267820 is an abundant number, since it is smaller than the sum of its proper divisors (1394644).

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

1267820 is a wasteful number, since it uses less digits than its factorization.

1267820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63400 (or 63398 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 1267820 is about 1125.9751329403. The cubic root of 1267820 is about 108.2312147495.

The spelling of 1267820 in words is "one million, two hundred sixty-seven thousand, eight hundred twenty".