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1220998 = 2738363
BaseRepresentation
bin100101010000110000110
32022000220011
410222012012
5303032443
642100434
713243522
oct4520606
92260804
101220998
11764399
124aa71a
133399ac
15191b9d
hex12a186

1220998 has 8 divisors (see below), whose sum is σ = 1856808. Its totient is φ = 602064.

The previous prime is 1220993. The next prime is 1221019. The reversal of 1220998 is 8990221.

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

It is a super-2 number, since 2×12209982 = 2981672232008, which contains 22 as substring.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4036 + ... + 4327.

It is an arithmetic number, because the mean of its divisors is an integer number (232101).

21220998 is an apocalyptic number.

1220998 is a deficient number, since it is larger than the sum of its proper divisors (635810).

1220998 is an equidigital number, since it uses as much as digits as its factorization.

1220998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8438.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 1220998 is about 1104.9877827379. The cubic root of 1220998 is about 106.8821014854.

The spelling of 1220998 in words is "one million, two hundred twenty thousand, nine hundred ninety-eight".

Divisors: 1 2 73 146 8363 16726 610499 1220998