1254240 has 144 divisors (see below), whose sum is σ = 4678128. Its totient is φ = 304128.

The previous prime is 1254217. The next prime is 1254241. The reversal of 1254240 is 424521.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1254241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18687 + ... + 18753.

It is an arithmetic number, because the mean of its divisors is an integer number (32487).

2^1254240 is an apocalyptic number.

1254240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1254240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2339064).

1254240 is an abundant number, since it is smaller than the sum of its proper divisors (3423888).

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

1254240 is a wasteful number, since it uses less digits than its factorization.

1254240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 1254240 is about 1119.9285691507. The cubic root of 1254240 is about 107.8433944228.

Adding to 1254240 its reverse (424521), we get a palindrome (1678761).

The spelling of 1254240 in words is "one million, two hundred fifty-four thousand, two hundred forty".