1225439377 has 2 divisors, whose sum is σ = 1225439378. Its totient is φ = 1225439376.

The previous prime is 1225439357. The next prime is 1225439401. The reversal of 1225439377 is 7739345221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 662753536 + 562685841 = 25744^2 + 23721^2 .

It is a cyclic number.

It is not a de Polignac number, because 1225439377 - 2⁷ = 1225439249 is a prime.

It is not a weakly prime, because it can be changed into another prime (1225439357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612719688 + 612719689.

It is an arithmetic number, because the mean of its divisors is an integer number (612719689).

Almost surely, 2^1225439377 is an apocalyptic number.

It is an amenable number.

1225439377 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225439377 is an equidigital number, since it uses as much as digits as its factorization.

1225439377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 317520, while the sum is 43.

The square root of 1225439377 is about 35006.2762515524. The cubic root of 1225439377 is about 1070.1153912298.

The spelling of 1225439377 in words is "one billion, two hundred twenty-five million, four hundred thirty-nine thousand, three hundred seventy-seven".