1020091253 has 2 divisors, whose sum is σ = 1020091254. Its totient is φ = 1020091252.

The previous prime is 1020091223. The next prime is 1020091379. The reversal of 1020091253 is 3521900201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 892694884 + 127396369 = 29878^2 + 11287^2 .

It is an emirp because it is prime and its reverse (3521900201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1020091253 - 2¹⁰ = 1020090229 is a prime.

It is a super-2 number, since 2×1020091253² = 2081172328894220018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020091223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510045626 + 510045627.

It is an arithmetic number, because the mean of its divisors is an integer number (510045627).

Almost surely, 2^1020091253 is an apocalyptic number.

It is an amenable number.

1020091253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020091253 is an equidigital number, since it uses as much as digits as its factorization.

1020091253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 1020091253 is about 31938.8674345225. The cubic root of 1020091253 is about 1006.6527274042.

Adding to 1020091253 its reverse (3521900201), we get a palindrome (4541991454).

The spelling of 1020091253 in words is "one billion, twenty million, ninety-one thousand, two hundred fifty-three".