1366428125 has 48 divisors (see below), whose sum is σ = 1835038800. Its totient is φ = 1017280000.

The previous prime is 1366428113. The next prime is 1366428163. The reversal of 1366428125 is 5218246631.

It can be written as a sum of positive squares in 24 ways, for example, as 1085966116 + 280462009 = 32954^2 + 16747^2 .

It is not a de Polignac number, because 1366428125 - 2⁴ = 1366428109 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15353081 + ... + 15353169.

It is an arithmetic number, because the mean of its divisors is an integer number (38229975).

Almost surely, 2^1366428125 is an apocalyptic number.

It is an amenable number.

1366428125 is a deficient number, since it is larger than the sum of its proper divisors (468610675).

1366428125 is an frugal number, since it uses more digits than its factorization.

1366428125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165 (or 111 counting only the distinct ones).

The product of its digits is 69120, while the sum is 38.

The square root of 1366428125 is about 36965.2285939097. The cubic root of 1366428125 is about 1109.6744777675.

The spelling of 1366428125 in words is "one billion, three hundred sixty-six million, four hundred twenty-eight thousand, one hundred twenty-five".