1340722 has 16 divisors (see below), whose sum is σ = 2177280. Its totient is φ = 616768.

The previous prime is 1340707. The next prime is 1340723. The reversal of 1340722 is 2270431.

It is a self number, because there is not a number n which added to its sum of digits gives 1340722.

It is not an unprimeable number, because it can be changed into a prime (1340723) 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, 1179 + ... + 2017.

It is an arithmetic number, because the mean of its divisors is an integer number (136080).

2^1340722 is an apocalyptic number.

1340722 is a deficient number, since it is larger than the sum of its proper divisors (836558).

1340722 is a wasteful number, since it uses less digits than its factorization.

1340722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 1340722 is about 1157.8955047844. The cubic root of 1340722 is about 110.2671742381.

Subtracting from 1340722 its sum of digits (19), we obtain a triangular number (1340703 = T₁₆₃₇).

The spelling of 1340722 in words is "one million, three hundred forty thousand, seven hundred twenty-two".