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12139253 = 71734179
BaseRepresentation
bin101110010011…
…101011110101
3211211201220222
4232103223311
511101424003
61112104125
7205116260
oct56235365
924751828
1012139253
116941445
124095045
1326904b9
14187dcd7
1510ebc38
hexb93af5

12139253 has 4 divisors (see below), whose sum is σ = 13873440. Its totient is φ = 10405068.

The previous prime is 12139249. The next prime is 12139277. The reversal of 12139253 is 35293121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35293121 = 67526763.

It is a cyclic number.

It is not a de Polignac number, because 12139253 - 22 = 12139249 is a prime.

It is a super-2 number, since 2×121392532 = 294722926796018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12139753) 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, 867083 + ... + 867096.

It is an arithmetic number, because the mean of its divisors is an integer number (3468360).

Almost surely, 212139253 is an apocalyptic number.

It is an amenable number.

12139253 is a deficient number, since it is larger than the sum of its proper divisors (1734187).

12139253 is an equidigital number, since it uses as much as digits as its factorization.

12139253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1734186.

The product of its digits is 1620, while the sum is 26.

The square root of 12139253 is about 3484.1430797256. The cubic root of 12139253 is about 229.8250276041.

The spelling of 12139253 in words is "twelve million, one hundred thirty-nine thousand, two hundred fifty-three".

Divisors: 1 7 1734179 12139253