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BaseRepresentation
bin100101010011101110000
32022002222020
410222131300
5303110022
642111440
713251114
oct4523560
92262866
101222512
11765545
124ab580
1333a5a5
1423b744
1519235c
hex12a770

1222512 has 20 divisors (see below), whose sum is σ = 3158280. Its totient is φ = 407488.

The previous prime is 1222499. The next prime is 1222513. The reversal of 1222512 is 2152221.

Adding to 1222512 its reverse (2152221), we get a palindrome (3374733).

It is a junction number, because it is equal to n+sod(n) for n = 1222491 and 1222500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222513) 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, 12687 + ... + 12782.

It is an arithmetic number, because the mean of its divisors is an integer number (157914).

21222512 is an apocalyptic number.

1222512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1222512 is an abundant number, since it is smaller than the sum of its proper divisors (1935768).

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

1222512 is a wasteful number, since it uses less digits than its factorization.

1222512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25480 (or 25474 counting only the distinct ones).

The product of its digits is 80, while the sum is 15.

The square root of 1222512 is about 1105.6726459491. The cubic root of 1222512 is about 106.9262600792.

The spelling of 1222512 in words is "one million, two hundred twenty-two thousand, five hundred twelve".