2125741081 has 4 divisors (see below), whose sum is σ = 2250784692. Its totient is φ = 2000697472.

The previous prime is 2125741049. The next prime is 2125741117. The reversal of 2125741081 is 1801475212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1712635456 + 413105625 = 41384^2 + 20325^2 .

It is a cyclic number.

It is not a de Polignac number, because 2125741081 - 2⁵ = 2125741049 is a prime.

It is a super-2 number, since 2×2125741081² = 9037550286902097122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2125741001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62521780 + ... + 62521813.

It is an arithmetic number, because the mean of its divisors is an integer number (562696173).

Almost surely, 2^2125741081 is an apocalyptic number.

It is an amenable number.

2125741081 is a deficient number, since it is larger than the sum of its proper divisors (125043611).

2125741081 is a wasteful number, since it uses less digits than its factorization.

2125741081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125043610.

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 2125741081 is about 46105.7597378028. The cubic root of 2125741081 is about 1285.7902311300.

The spelling of 2125741081 in words is "two billion, one hundred twenty-five million, seven hundred forty-one thousand, eighty-one".