1407240 has 64 divisors (see below), whose sum is σ = 4694400. Its totient is φ = 374976.

The previous prime is 1407229. The next prime is 1407247. The reversal of 1407240 is 427041.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (1407247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 429 + ... + 1731.

It is an arithmetic number, because the mean of its divisors is an integer number (73350).

2^1407240 is an apocalyptic number.

1407240 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 1407240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2347200).

1407240 is an abundant number, since it is smaller than the sum of its proper divisors (3287160).

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

1407240 is a wasteful number, since it uses less digits than its factorization.

1407240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1323 (or 1313 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 1407240 is about 1186.2714697741. The cubic root of 1407240 is about 112.0614034046.

The spelling of 1407240 in words is "one million, four hundred seven thousand, two hundred forty".