1402240 has 64 divisors (see below), whose sum is σ = 3843360. Its totient is φ = 479232.

The previous prime is 1402231. The next prime is 1402249. The reversal of 1402240 is 422041.

It is an interprime number because it is at equal distance from previous prime (1402231) and next prime (1402249).

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 1402240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1402249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4324 + ... + 4636.

2^1402240 is an apocalyptic number.

1402240 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 1402240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1921680).

1402240 is an abundant number, since it is smaller than the sum of its proper divisors (2441120).

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

1402240 is an equidigital number, since it uses as much as digits as its factorization.

1402240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339 (or 327 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 1402240 is about 1184.1621510587. The cubic root of 1402240 is about 111.9285258262.

Adding to 1402240 its reverse (422041), we get a palindrome (1824281).

It can be divided in two parts, 140 and 2240, that multiplied together give a square (313600 = 560²).

The spelling of 1402240 in words is "one million, four hundred two thousand, two hundred forty".