1246734649 has 2 divisors, whose sum is σ = 1246734650. Its totient is φ = 1246734648.

The previous prime is 1246734641. The next prime is 1246734673. The reversal of 1246734649 is 9464376421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1242069049 + 4665600 = 35243^2 + 2160^2 .

It is a cyclic number.

It is not a de Polignac number, because 1246734649 - 2³ = 1246734641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1246734599 and 1246734608.

It is not a weakly prime, because it can be changed into another prime (1246734641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 623367324 + 623367325.

It is an arithmetic number, because the mean of its divisors is an integer number (623367325).

Almost surely, 2^1246734649 is an apocalyptic number.

It is an amenable number.

1246734649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1246734649 is an equidigital number, since it uses as much as digits as its factorization.

1246734649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 46.

The square root of 1246734649 is about 35309.1298250183. The cubic root of 1246734649 is about 1076.2785289945.

The spelling of 1246734649 in words is "one billion, two hundred forty-six million, seven hundred thirty-four thousand, six hundred forty-nine".