1226261601 has 6 divisors (see below), whose sum is σ = 1771266770. Its totient is φ = 817507728.

The previous prime is 1226261599. The next prime is 1226261651. The reversal of 1226261601 is 1061626221.

1226261601 is a `hidden beast` number, since 1 + 22 + 626 + 16 + 0 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1193771601 + 32490000 = 34551^2 + 5700^2 .

It is not a de Polignac number, because 1226261601 - 2¹ = 1226261599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1226261651) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 68125636 + ... + 68125653.

Almost surely, 2^1226261601 is an apocalyptic number.

It is an amenable number.

1226261601 is a deficient number, since it is larger than the sum of its proper divisors (545005169).

1226261601 is a wasteful number, since it uses less digits than its factorization.

1226261601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136251295 (or 136251292 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 1226261601 is about 35018.0182334752. The cubic root of 1226261601 is about 1070.3546735257.

Adding to 1226261601 its reverse (1061626221), we get a palindrome (2287887822).

The spelling of 1226261601 in words is "one billion, two hundred twenty-six million, two hundred sixty-one thousand, six hundred one".