1020138451 has 2 divisors, whose sum is σ = 1020138452. Its totient is φ = 1020138450.

The previous prime is 1020138439. The next prime is 1020138461. The reversal of 1020138451 is 1548310201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1020138451 - 2⁵ = 1020138419 is a prime.

It is not a weakly prime, because it can be changed into another prime (1020138461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510069225 + 510069226.

It is an arithmetic number, because the mean of its divisors is an integer number (510069226).

Almost surely, 2^1020138451 is an apocalyptic number.

1020138451 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020138451 is an equidigital number, since it uses as much as digits as its factorization.

1020138451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 1020138451 is about 31939.6063062775. The cubic root of 1020138451 is about 1006.6682525717.

Adding to 1020138451 its reverse (1548310201), we get a palindrome (2568448652).

The spelling of 1020138451 in words is "one billion, twenty million, one hundred thirty-eight thousand, four hundred fifty-one".