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12489950 = 2521122709
BaseRepresentation
bin101111101001…
…010011011110
3212111112222202
4233221103132
511144134300
61123411502
7211106564
oct57512336
925445882
1012489950
117060980
124223b92
132784005
141931a34
15116aad5
hexbe94de

12489950 has 24 divisors (see below), whose sum is σ = 25344360. Its totient is φ = 4541600.

The previous prime is 12489941. The next prime is 12489959. The reversal of 12489950 is 5998421.

It is an interprime number because it is at equal distance from previous prime (12489941) and next prime (12489959).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12489959) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10805 + ... + 11904.

It is an arithmetic number, because the mean of its divisors is an integer number (1056015).

Almost surely, 212489950 is an apocalyptic number.

12489950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12489950 is an abundant number, since it is smaller than the sum of its proper divisors (12854410).

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

12489950 is a wasteful number, since it uses less digits than its factorization.

12489950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22732 (or 22727 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 12489950 is about 3534.1123355094. The cubic root of 12489950 is about 232.0172277139.

The spelling of 12489950 in words is "twelve million, four hundred eighty-nine thousand, nine hundred fifty".

Divisors: 1 2 5 10 11 22 25 50 55 110 275 550 22709 45418 113545 227090 249799 499598 567725 1135450 1248995 2497990 6244975 12489950