12025661 has 4 divisors (see below), whose sum is σ = 12073824. Its totient is φ = 11977500.

The previous prime is 12025649. The next prime is 12025667. The reversal of 12025661 is 16652021.

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: 16652021 = 2437 ⋅6833.

It is a cyclic number.

It is not a de Polignac number, because 12025661 - 2⁶ = 12025597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12025667) 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, 23705 + ... + 24206.

It is an arithmetic number, because the mean of its divisors is an integer number (3018456).

Almost surely, 2^12025661 is an apocalyptic number.

It is an amenable number.

12025661 is a deficient number, since it is larger than the sum of its proper divisors (48163).

12025661 is an equidigital number, since it uses as much as digits as its factorization.

12025661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48162.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 12025661 is about 3467.8034834748. The cubic root of 12025661 is about 229.1059240590.

Adding to 12025661 its reverse (16652021), we get a palindrome (28677682).

The spelling of 12025661 in words is "twelve million, twenty-five thousand, six hundred sixty-one".