2126450261 has 16 divisors (see below), whose sum is σ = 2312565360. Its totient is φ = 1943654400.

The previous prime is 2126450237. The next prime is 2126450309. The reversal of 2126450261 is 1620546212.

It can be written as a sum of positive squares in 8 ways, for example, as 30184036 + 2096266225 = 5494^2 + 45785^2 .

It is a cyclic number.

It is not a de Polignac number, because 2126450261 - 2¹⁴ = 2126433877 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 (2126450461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 572711 + ... + 576411.

It is an arithmetic number, because the mean of its divisors is an integer number (144535335).

Almost surely, 2^2126450261 is an apocalyptic number.

It is an amenable number.

2126450261 is a deficient number, since it is larger than the sum of its proper divisors (186115099).

2126450261 is a wasteful number, since it uses less digits than its factorization.

2126450261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4136.

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

The square root of 2126450261 is about 46113.4498926289. The cubic root of 2126450261 is about 1285.9332017141.

Adding to 2126450261 its reverse (1620546212), we get a palindrome (3746996473).

The spelling of 2126450261 in words is "two billion, one hundred twenty-six million, four hundred fifty thousand, two hundred sixty-one".