1226773081 has 4 divisors (see below), whose sum is σ = 1227978000. Its totient is φ = 1225568164.

The previous prime is 1226773039. The next prime is 1226773123. The reversal of 1226773081 is 1803776221.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1803776221 = 13 ⋅138752017.

It is an interprime number because it is at equal distance from previous prime (1226773039) and next prime (1226773123).

It is a cyclic number.

It is not a de Polignac number, because 1226773081 - 2¹⁵ = 1226740313 is a prime.

It is a super-2 number, since 2×1226773081² = 3009944384532465122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1226773081.

It is not an unprimeable number, because it can be changed into a prime (1226773181) 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, 600931 + ... + 602968.

It is an arithmetic number, because the mean of its divisors is an integer number (306994500).

Almost surely, 2^1226773081 is an apocalyptic number.

It is an amenable number.

1226773081 is a deficient number, since it is larger than the sum of its proper divisors (1204919).

1226773081 is a wasteful number, since it uses less digits than its factorization.

1226773081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1204918.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 1226773081 is about 35025.3205695537. The cubic root of 1226773081 is about 1070.5034696469.

The spelling of 1226773081 in words is "one billion, two hundred twenty-six million, seven hundred seventy-three thousand, eighty-one".