12533890 has 16 divisors (see below), whose sum is σ = 22653432. Its totient is φ = 4993024.

The previous prime is 12533869. The next prime is 12533893. The reversal of 12533890 is 9833521.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11771761 + 762129 = 3431^2 + 873^2 .

It is not an unprimeable number, because it can be changed into a prime (12533893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132 + ... + 5008.

Almost surely, 2^12533890 is an apocalyptic number.

12533890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12533890 is a deficient number, since it is larger than the sum of its proper divisors (10119542).

12533890 is a wasteful number, since it uses less digits than its factorization.

12533890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5141.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 12533890 is about 3540.3234315525. The cubic root of 12533890 is about 232.2889903459.

The spelling of 12533890 in words is "twelve million, five hundred thirty-three thousand, eight hundred ninety".