1277047061 has 2 divisors, whose sum is σ = 1277047062. Its totient is φ = 1277047060.

The previous prime is 1277046997. The next prime is 1277047073. The reversal of 1277047061 is 1607407721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1000456900 + 276590161 = 31630^2 + 16631^2 .

It is a cyclic number.

It is not a de Polignac number, because 1277047061 - 2⁶ = 1277046997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1277047091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638523530 + 638523531.

It is an arithmetic number, because the mean of its divisors is an integer number (638523531).

Almost surely, 2^1277047061 is an apocalyptic number.

It is an amenable number.

1277047061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1277047061 is an equidigital number, since it uses as much as digits as its factorization.

1277047061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16464, while the sum is 35.

The square root of 1277047061 is about 35735.7952339108. The cubic root of 1277047061 is about 1084.9314548215.

Subtracting 1277047061 from its reverse (1607407721), we obtain a triangular number (330360660 = T₂₅₇₀₄).

The spelling of 1277047061 in words is "one billion, two hundred seventy-seven million, forty-seven thousand, sixty-one".