1455120257 has 2 divisors, whose sum is σ = 1455120258. Its totient is φ = 1455120256.

The previous prime is 1455120239. The next prime is 1455120259. The reversal of 1455120257 is 7520215541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1453058161 + 2062096 = 38119^2 + 1436^2 .

It is a cyclic number.

It is not a de Polignac number, because 1455120257 - 2⁶ = 1455120193 is a prime.

Together with 1455120259, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1455120259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 727560128 + 727560129.

It is an arithmetic number, because the mean of its divisors is an integer number (727560129).

Almost surely, 2^1455120257 is an apocalyptic number.

It is an amenable number.

1455120257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1455120257 is an equidigital number, since it uses as much as digits as its factorization.

1455120257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14000, while the sum is 32.

The square root of 1455120257 is about 38146.0385492386. The cubic root of 1455120257 is about 1133.1818995955.

Adding to 1455120257 its reverse (7520215541), we get a palindrome (8975335798).

The spelling of 1455120257 in words is "one billion, four hundred fifty-five million, one hundred twenty thousand, two hundred fifty-seven".