12015090 has 48 divisors (see below), whose sum is σ = 33081048. Its totient is φ = 3015168.

The previous prime is 12015083. The next prime is 12015097. The reversal of 12015090 is 9051021.

It is an interprime number because it is at equal distance from previous prime (12015083) and next prime (12015097).

It can be written as a sum of positive squares in 4 ways, for example, as 7767369 + 4247721 = 2787^2 + 2061^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (12015097) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2397 + ... + 5456.

Almost surely, 2^12015090 is an apocalyptic number.

12015090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12015090 is an abundant number, since it is smaller than the sum of its proper divisors (21065958).

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

12015090 is a wasteful number, since it uses less digits than its factorization.

12015090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7883 (or 7880 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

The square root of 12015090 is about 3466.2789847328. The cubic root of 12015090 is about 229.0387735240.

The spelling of 12015090 in words is "twelve million, fifteen thousand, ninety".