1022157253 has 8 divisors (see below), whose sum is σ = 1105512408. Its totient is φ = 939477504.

The previous prime is 1022157239. The next prime is 1022157259. The reversal of 1022157253 is 3527512201.

It can be written as a sum of positive squares in 4 ways, for example, as 12061729 + 1010095524 = 3473^2 + 31782^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1022157253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022157259) 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 in 7 ways as a sum of consecutive naturals, for example, 165700 + ... + 171757.

It is an arithmetic number, because the mean of its divisors is an integer number (138189051).

Almost surely, 2^1022157253 is an apocalyptic number.

1022157253 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1022157253 is a deficient number, since it is larger than the sum of its proper divisors (83355155).

1022157253 is a wasteful number, since it uses less digits than its factorization.

1022157253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337703.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 1022157253 is about 31971.1941128260. The cubic root of 1022157253 is about 1007.3318634013.

Adding to 1022157253 its reverse (3527512201), we get a palindrome (4549669454).

The spelling of 1022157253 in words is "one billion, twenty-two million, one hundred fifty-seven thousand, two hundred fifty-three".