1011420257 has 2 divisors, whose sum is σ = 1011420258. Its totient is φ = 1011420256.

The previous prime is 1011420251. The next prime is 1011420281. The reversal of 1011420257 is 7520241101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 962922961 + 48497296 = 31031^2 + 6964^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011420257 - 2¹⁴ = 1011403873 is a prime.

It is not a weakly prime, because it can be changed into another prime (1011420251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505710128 + 505710129.

It is an arithmetic number, because the mean of its divisors is an integer number (505710129).

Almost surely, 2^1011420257 is an apocalyptic number.

It is an amenable number.

1011420257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011420257 is an equidigital number, since it uses as much as digits as its factorization.

1011420257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 1011420257 is about 31802.8341032682. The cubic root of 1011420257 is about 1003.7923522175.

Adding to 1011420257 its reverse (7520241101), we get a palindrome (8531661358).

The spelling of 1011420257 in words is "one billion, eleven million, four hundred twenty thousand, two hundred fifty-seven".