1251408 has 60 divisors (see below), whose sum is σ = 3456128. Its totient is φ = 389760.

The previous prime is 1251329. The next prime is 1251409. The reversal of 1251408 is 8041521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40353 + ... + 40383.

2^1251408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1251408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1728064).

1251408 is an abundant number, since it is smaller than the sum of its proper divisors (2204720).

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

1251408 is a wasteful number, since it uses less digits than its factorization.

1251408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100 (or 65 counting only the distinct ones).

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

The square root of 1251408 is about 1118.6634882752. The cubic root of 1251408 is about 107.7621652456.

Adding to 1251408 its reverse (8041521), we get a palindrome (9292929).

The spelling of 1251408 in words is "one million, two hundred fifty-one thousand, four hundred eight".