1021285253 has 2 divisors, whose sum is σ = 1021285254. Its totient is φ = 1021285252.

The previous prime is 1021285247. The next prime is 1021285267. The reversal of 1021285253 is 3525821201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 878411044 + 142874209 = 29638^2 + 11953^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021285253 - 2¹⁸ = 1021023109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021785253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510642626 + 510642627.

It is an arithmetic number, because the mean of its divisors is an integer number (510642627).

Almost surely, 2^1021285253 is an apocalyptic number.

It is an amenable number.

1021285253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021285253 is an equidigital number, since it uses as much as digits as its factorization.

1021285253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 1021285253 is about 31957.5539270452. The cubic root of 1021285253 is about 1007.0453310744.

The spelling of 1021285253 in words is "one billion, twenty-one million, two hundred eighty-five thousand, two hundred fifty-three".