1230785137 has 2 divisors, whose sum is σ = 1230785138. Its totient is φ = 1230785136.

The previous prime is 1230785119. The next prime is 1230785203. The reversal of 1230785137 is 7315870321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1092699136 + 138086001 = 33056^2 + 11751^2 .

It is a cyclic number.

It is not a de Polignac number, because 1230785137 - 2¹¹ = 1230783089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1230785096 and 1230785105.

It is not a weakly prime, because it can be changed into another prime (1230785117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615392568 + 615392569.

It is an arithmetic number, because the mean of its divisors is an integer number (615392569).

Almost surely, 2^1230785137 is an apocalyptic number.

It is an amenable number.

1230785137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1230785137 is an equidigital number, since it uses as much as digits as its factorization.

1230785137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 1230785137 is about 35082.5474702166. The cubic root of 1230785137 is about 1071.6691963184.

The spelling of 1230785137 in words is "one billion, two hundred thirty million, seven hundred eighty-five thousand, one hundred thirty-seven".