1427240 has 32 divisors (see below), whose sum is σ = 3317760. Its totient is φ = 552000.

The previous prime is 1427233. The next prime is 1427281. The reversal of 1427240 is 427241.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 665 + ... + 1815.

It is an arithmetic number, because the mean of its divisors is an integer number (103680).

2^1427240 is an apocalyptic number.

1427240 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 1427240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1658880).

1427240 is an abundant number, since it is smaller than the sum of its proper divisors (1890520).

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

1427240 is a wasteful number, since it uses less digits than its factorization.

1427240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1193 (or 1189 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 1427240 is about 1194.6715029664. The cubic root of 1427240 is about 112.5897884014.

Subtracting from 1427240 its reverse (427241), we obtain a palindrome (999999).

The spelling of 1427240 in words is "one million, four hundred twenty-seven thousand, two hundred forty".