1226500129 has 4 divisors (see below), whose sum is σ = 1226622384. Its totient is φ = 1226377876.

The previous prime is 1226500127. The next prime is 1226500153. The reversal of 1226500129 is 9210056221.

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 1226500129 - 2¹ = 1226500127 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1226500097 and 1226500106.

It is not an unprimeable number, because it can be changed into a prime (1226500127) 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, 44587 + ... + 66640.

It is an arithmetic number, because the mean of its divisors is an integer number (306655596).

Almost surely, 2^1226500129 is an apocalyptic number.

It is an amenable number.

1226500129 is a deficient number, since it is larger than the sum of its proper divisors (122255).

1226500129 is a wasteful number, since it uses less digits than its factorization.

1226500129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122254.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1226500129 is about 35021.4238574048. The cubic root of 1226500129 is about 1070.4240695413.

The spelling of 1226500129 in words is "one billion, two hundred twenty-six million, five hundred thousand, one hundred twenty-nine".