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12155146 = 26077573
BaseRepresentation
bin101110010111…
…100100001010
3211212112201121
4232113210022
511102431041
61112305454
7205213513
oct56274412
924775647
1012155146
116952383
1240a228a
1326977c3
141885a0a
1511017d1
hexb9790a

12155146 has 4 divisors (see below), whose sum is σ = 18232722. Its totient is φ = 6077572.

The previous prime is 12155137. The next prime is 12155159. The reversal of 12155146 is 64155121.

It is a happy number.

12155146 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64155121 = 97661393.

It can be written as a sum of positive squares in only one way, i.e., 6702921 + 5452225 = 2589^2 + 2335^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12155146.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3038785 + ... + 3038788.

Almost surely, 212155146 is an apocalyptic number.

12155146 is a deficient number, since it is larger than the sum of its proper divisors (6077576).

12155146 is an equidigital number, since it uses as much as digits as its factorization.

12155146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6077575.

The product of its digits is 1200, while the sum is 25.

The square root of 12155146 is about 3486.4230953801. The cubic root of 12155146 is about 229.9252813373.

Subtracting from 12155146 its sum of digits (25), we obtain a palindrome (12155121).

The spelling of 12155146 in words is "twelve million, one hundred fifty-five thousand, one hundred forty-six".

Divisors: 1 2 6077573 12155146