1661342 has 16 divisors (see below), whose sum is σ = 2665872. Its totient is φ = 773760.

The previous prime is 1661333. The next prime is 1661347. The reversal of 1661342 is 2431661.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1661347) 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, 4268 + ... + 4640.

It is an arithmetic number, because the mean of its divisors is an integer number (166617).

2^1661342 is an apocalyptic number.

1661342 is a deficient number, since it is larger than the sum of its proper divisors (1004530).

1661342 is a wasteful number, since it uses less digits than its factorization.

1661342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523.

The product of its digits is 864, while the sum is 23.

The square root of 1661342 is about 1288.9305644603. The cubic root of 1661342 is about 118.4367136420.

The spelling of 1661342 in words is "one million, six hundred sixty-one thousand, three hundred forty-two".