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1661242 = 21175511
BaseRepresentation
bin110010101100100111010
310010101210111
412111210322
5411124432
655334534
720056162
oct6254472
93111714
101661242
11a35130
1268144a
134621ab
143135a2
1522c347
hex19593a

1661242 has 8 divisors (see below), whose sum is σ = 2718432. Its totient is φ = 755100.

The previous prime is 1661237. The next prime is 1661243. The reversal of 1661242 is 2421661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 75511 = 1661242 / (1 + 6 + 6 + 1 + 2 + 4 + 2).

It is not an unprimeable number, because it can be changed into a prime (1661243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37734 + ... + 37777.

It is an arithmetic number, because the mean of its divisors is an integer number (339804).

21661242 is an apocalyptic number.

1661242 is a deficient number, since it is larger than the sum of its proper divisors (1057190).

1661242 is a wasteful number, since it uses less digits than its factorization.

1661242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75524.

The product of its digits is 576, while the sum is 22.

The square root of 1661242 is about 1288.8917720274. The cubic root of 1661242 is about 118.4343372682.

The spelling of 1661242 in words is "one million, six hundred sixty-one thousand, two hundred forty-two".

Divisors: 1 2 11 22 75511 151022 830621 1661242