1251984 has 20 divisors (see below), whose sum is σ = 3234416. Its totient is φ = 417312.

The previous prime is 1251983. The next prime is 1252021. The reversal of 1251984 is 4891521.

It is a happy number.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1251983) 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, 12994 + ... + 13089.

2^1251984 is an apocalyptic number.

It is an amenable number.

1251984 is an abundant number, since it is smaller than the sum of its proper divisors (1982432).

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

1251984 is a wasteful number, since it uses less digits than its factorization.

1251984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26094 (or 26088 counting only the distinct ones).

The product of its digits is 2880, while the sum is 30.

The square root of 1251984 is about 1118.9209087331. The cubic root of 1251984 is about 107.7786963546.

The spelling of 1251984 in words is "one million, two hundred fifty-one thousand, nine hundred eighty-four".