1402740 has 36 divisors (see below), whose sum is σ = 4255524. Its totient is φ = 374016.

The previous prime is 1402727. The next prime is 1402763. The reversal of 1402740 is 472041.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1028196 + 374544 = 1014^2 + 612^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3717 + ... + 4076.

It is an arithmetic number, because the mean of its divisors is an integer number (118209).

2^1402740 is an apocalyptic number.

1402740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1402740 is an abundant number, since it is smaller than the sum of its proper divisors (2852784).

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

1402740 is a wasteful number, since it uses less digits than its factorization.

1402740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7808 (or 7803 counting only the distinct ones).

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

The square root of 1402740 is about 1184.3732519776. The cubic root of 1402740 is about 111.9418277841.

Adding to 1402740 its reverse (472041), we get a palindrome (1874781).

The spelling of 1402740 in words is "one million, four hundred two thousand, seven hundred forty".