2612261021 has 4 divisors (see below), whose sum is σ = 2765923452. Its totient is φ = 2458598592.

The previous prime is 2612261017. The next prime is 2612261077. The reversal of 2612261021 is 1201622162.

It is a happy number.

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 2211820900 + 400440121 = 47030^2 + 20011^2 .

It is a cyclic number.

It is not a de Polignac number, because 2612261021 - 2² = 2612261017 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 (2612263021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76831190 + ... + 76831223.

It is an arithmetic number, because the mean of its divisors is an integer number (691480863).

Almost surely, 2^2612261021 is an apocalyptic number.

It is an amenable number.

2612261021 is a deficient number, since it is larger than the sum of its proper divisors (153662431).

2612261021 is a wasteful number, since it uses less digits than its factorization.

2612261021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153662430.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 2612261021 is about 51110.2829281936. The cubic root of 2612261021 is about 1377.2269844072.

Adding to 2612261021 its reverse (1201622162), we get a palindrome (3813883183).

The spelling of 2612261021 in words is "two billion, six hundred twelve million, two hundred sixty-one thousand, twenty-one".