1226520412 has 48 divisors (see below), whose sum is σ = 2406970944. Its totient is φ = 543168000.

The previous prime is 1226520397. The next prime is 1226520431. The reversal of 1226520412 is 2140256221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125337 + ... + 134767.

It is an arithmetic number, because the mean of its divisors is an integer number (50145228).

Almost surely, 2^1226520412 is an apocalyptic number.

It is an amenable number.

1226520412 is a deficient number, since it is larger than the sum of its proper divisors (1180450532).

1226520412 is a wasteful number, since it uses less digits than its factorization.

1226520412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9550 (or 9548 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 1226520412 is about 35021.7134360956. The cubic root of 1226520412 is about 1070.4299701499.

Adding to 1226520412 its reverse (2140256221), we get a palindrome (3366776633).

The spelling of 1226520412 in words is "one billion, two hundred twenty-six million, five hundred twenty thousand, four hundred twelve".