1226621125 has 8 divisors (see below), whose sum is σ = 1530823320. Its totient is φ = 981296800.

The previous prime is 1226621107. The next prime is 1226621153. The reversal of 1226621125 is 5211266221.

It can be written as a sum of positive squares in 4 ways, for example, as 202749121 + 1023872004 = 14239^2 + 31998^2 .

It is not a de Polignac number, because 1226621125 - 2²³ = 1218232517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1226621093 and 1226621102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4906360 + ... + 4906609.

It is an arithmetic number, because the mean of its divisors is an integer number (191352915).

Almost surely, 2^1226621125 is an apocalyptic number.

It is an amenable number.

1226621125 is a deficient number, since it is larger than the sum of its proper divisors (304202195).

1226621125 is an frugal number, since it uses more digits than its factorization.

1226621125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9812984 (or 9812974 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The square root of 1226621125 is about 35023.1512716946. The cubic root of 1226621125 is about 1070.4592680080.

Adding to 1226621125 its reverse (5211266221), we get a palindrome (6437887346).

The spelling of 1226621125 in words is "one billion, two hundred twenty-six million, six hundred twenty-one thousand, one hundred twenty-five".