2012425661 has 2 divisors, whose sum is σ = 2012425662. Its totient is φ = 2012425660.

The previous prime is 2012425619. The next prime is 2012425663. The reversal of 2012425661 is 1665242102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1824571225 + 187854436 = 42715^2 + 13706^2 .

It is a cyclic number.

It is not a de Polignac number, because 2012425661 - 2²⁶ = 1945316797 is a prime.

Together with 2012425663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2012425663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006212830 + 1006212831.

It is an arithmetic number, because the mean of its divisors is an integer number (1006212831).

Almost surely, 2^2012425661 is an apocalyptic number.

It is an amenable number.

2012425661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012425661 is an equidigital number, since it uses as much as digits as its factorization.

2012425661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 2012425661 is about 44860.0675545635. The cubic root of 2012425661 is about 1262.5248902193.

Adding to 2012425661 its reverse (1665242102), we get a palindrome (3677667763).

The spelling of 2012425661 in words is "two billion, twelve million, four hundred twenty-five thousand, six hundred sixty-one".