1480778261 has 2 divisors, whose sum is σ = 1480778262. Its totient is φ = 1480778260.

The previous prime is 1480778237. The next prime is 1480778269. The reversal of 1480778261 is 1628770841.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1435955236 + 44823025 = 37894^2 + 6695^2 .

It is an emirp because it is prime and its reverse (1628770841) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1480778261 - 2⁶ = 1480778197 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1480778269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 740389130 + 740389131.

It is an arithmetic number, because the mean of its divisors is an integer number (740389131).

Almost surely, 2^1480778261 is an apocalyptic number.

It is an amenable number.

1480778261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1480778261 is an equidigital number, since it uses as much as digits as its factorization.

1480778261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150528, while the sum is 44.

The square root of 1480778261 is about 38480.8817596479. The cubic root of 1480778261 is about 1139.8035623878.

The spelling of 1480778261 in words is "one billion, four hundred eighty million, seven hundred seventy-eight thousand, two hundred sixty-one".