1226155526 has 4 divisors (see below), whose sum is σ = 1839233292. Its totient is φ = 613077762.

The previous prime is 1226155499. The next prime is 1226155529. The reversal of 1226155526 is 6255516221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6255516221 = 1493 ⋅4189897.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226155529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306538880 + ... + 306538883.

It is an arithmetic number, because the mean of its divisors is an integer number (459808323).

Almost surely, 2^1226155526 is an apocalyptic number.

1226155526 is a deficient number, since it is larger than the sum of its proper divisors (613077766).

1226155526 is an equidigital number, since it uses as much as digits as its factorization.

1226155526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613077765.

The product of its digits is 36000, while the sum is 35.

The square root of 1226155526 is about 35016.5036232917. The cubic root of 1226155526 is about 1070.3238097617.

The spelling of 1226155526 in words is "one billion, two hundred twenty-six million, one hundred fifty-five thousand, five hundred twenty-six".