105021157 has 4 divisors (see below), whose sum is σ = 106201260. Its totient is φ = 103841056.

The previous prime is 105021139. The next prime is 105021247. The reversal of 105021157 is 751120501.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46253601 + 58767556 = 6801^2 + 7666^2 .

It is a cyclic number.

It is not a de Polignac number, because 105021157 - 2⁷ = 105021029 is a prime.

It is a super-2 number, since 2×105021157² = 22058886835237298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105021107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 589918 + ... + 590095.

It is an arithmetic number, because the mean of its divisors is an integer number (26550315).

Almost surely, 2^105021157 is an apocalyptic number.

It is an amenable number.

105021157 is a deficient number, since it is larger than the sum of its proper divisors (1180103).

105021157 is an equidigital number, since it uses as much as digits as its factorization.

105021157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1180102.

The product of its (nonzero) digits is 350, while the sum is 22.

The square root of 105021157 is about 10247.9830698533. The cubic root of 105021157 is about 471.8010823327.

Adding to 105021157 its reverse (751120501), we get a palindrome (856141658).

The spelling of 105021157 in words is "one hundred five million, twenty-one thousand, one hundred fifty-seven".