2122457261 has 8 divisors (see below), whose sum is σ = 2152967544. Its totient is φ = 2091985920.

The previous prime is 2122457257. The next prime is 2122457269. The reversal of 2122457261 is 1627542212.

It can be written as a sum of positive squares in 4 ways, for example, as 4708900 + 2117748361 = 2170^2 + 46019^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2122457261 - 2² = 2122457257 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 (2122457269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110621 + ... + 128381.

It is an arithmetic number, because the mean of its divisors is an integer number (269120943).

Almost surely, 2^2122457261 is an apocalyptic number.

It is an amenable number.

2122457261 is a deficient number, since it is larger than the sum of its proper divisors (30510283).

2122457261 is a wasteful number, since it uses less digits than its factorization.

2122457261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19471.

The product of its digits is 13440, while the sum is 32.

The square root of 2122457261 is about 46070.1341543521. The cubic root of 2122457261 is about 1285.1277986618.

Adding to 2122457261 its reverse (1627542212), we get a palindrome (3749999473).

The spelling of 2122457261 in words is "two billion, one hundred twenty-two million, four hundred fifty-seven thousand, two hundred sixty-one".