1226542261 has 8 divisors (see below), whose sum is σ = 1402000704. Its totient is φ = 1051143360.

The previous prime is 1226542199. The next prime is 1226542351. The reversal of 1226542261 is 1622456221.

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 1226542261 - 2¹³ = 1226534069 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 (1226542661) 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, 45726 + ... + 67408.

It is an arithmetic number, because the mean of its divisors is an integer number (175250088).

Almost surely, 2^1226542261 is an apocalyptic number.

It is an amenable number.

1226542261 is a deficient number, since it is larger than the sum of its proper divisors (175458443).

1226542261 is an equidigital number, since it uses as much as digits as its factorization.

1226542261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29771.

The product of its digits is 11520, while the sum is 31.

The square root of 1226542261 is about 35022.0253697584. The cubic root of 1226542261 is about 1070.4363262571.

Adding to 1226542261 its reverse (1622456221), we get a palindrome (2848998482).

The spelling of 1226542261 in words is "one billion, two hundred twenty-six million, five hundred forty-two thousand, two hundred sixty-one".