1455420157 has 2 divisors, whose sum is σ = 1455420158. Its totient is φ = 1455420156.

The previous prime is 1455420149. The next prime is 1455420193. The reversal of 1455420157 is 7510245541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1055860036 + 399560121 = 32494^2 + 19989^2 .

It is a cyclic number.

It is not a de Polignac number, because 1455420157 - 2³ = 1455420149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1455420137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 727710078 + 727710079.

It is an arithmetic number, because the mean of its divisors is an integer number (727710079).

Almost surely, 2^1455420157 is an apocalyptic number.

It is an amenable number.

1455420157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1455420157 is an equidigital number, since it uses as much as digits as its factorization.

1455420157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28000, while the sum is 34.

The square root of 1455420157 is about 38149.9692922550. The cubic root of 1455420157 is about 1133.2597437704.

Adding to 1455420157 its reverse (7510245541), we get a palindrome (8965665698).

The spelling of 1455420157 in words is "one billion, four hundred fifty-five million, four hundred twenty thousand, one hundred fifty-seven".