1531722 has 16 divisors (see below), whose sum is σ = 3169440. Its totient is φ = 492912.

The previous prime is 1531721. The next prime is 1531729. The reversal of 1531722 is 2271351.

It is not an unprimeable number, because it can be changed into a prime (1531721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4228 + ... + 4575.

It is an arithmetic number, because the mean of its divisors is an integer number (198090).

2^1531722 is an apocalyptic number.

1531722 is an abundant number, since it is smaller than the sum of its proper divisors (1637718).

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

1531722 is a wasteful number, since it uses less digits than its factorization.

1531722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8837.

The product of its digits is 420, while the sum is 21.

The square root of 1531722 is about 1237.6275691823. The cubic root of 1531722 is about 115.2727489470.

The spelling of 1531722 in words is "one million, five hundred thirty-one thousand, seven hundred twenty-two".