1281252 has 36 divisors (see below), whose sum is σ = 3479280. Its totient is φ = 365904.

The previous prime is 1281229. The next prime is 1281253. The reversal of 1281252 is 2521821.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1281253) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 502 + ... + 1677.

2^1281252 is an apocalyptic number.

1281252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1281252 is an abundant number, since it is smaller than the sum of its proper divisors (2198028).

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

1281252 is a wasteful number, since it uses less digits than its factorization.

1281252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2200 (or 2191 counting only the distinct ones).

The product of its digits is 320, while the sum is 21.

The square root of 1281252 is about 1131.9240257190. The cubic root of 1281252 is about 108.6120936578.

The spelling of 1281252 in words is "one million, two hundred eighty-one thousand, two hundred fifty-two".