1226205061 has 4 divisors (see below), whose sum is σ = 1227130432. Its totient is φ = 1225279692.

The previous prime is 1226205059. The next prime is 1226205107. The reversal of 1226205061 is 1605026221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1226205061 - 2¹ = 1226205059 is a prime.

It is a super-4 number, since 4×1226205061⁴ (a number of 37 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226205361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 460695 + ... + 463348.

It is an arithmetic number, because the mean of its divisors is an integer number (306782608).

Almost surely, 2^1226205061 is an apocalyptic number.

It is an amenable number.

1226205061 is a deficient number, since it is larger than the sum of its proper divisors (925371).

1226205061 is an equidigital number, since it uses as much as digits as its factorization.

1226205061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925370.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1226205061 is about 35017.2109254863. The cubic root of 1226205061 is about 1070.3382227719.

The spelling of 1226205061 in words is "one billion, two hundred twenty-six million, two hundred five thousand, sixty-one".