1055121497 has 4 divisors (see below), whose sum is σ = 1057072356. Its totient is φ = 1053170640.

The previous prime is 1055121491. The next prime is 1055121533. The reversal of 1055121497 is 7941215501.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7941215501 = 317 ⋅25051153.

It can be written as a sum of positive squares in 2 ways, for example, as 119006281 + 936115216 = 10909^2 + 30596^2 .

It is a cyclic number.

It is not a de Polignac number, because 1055121497 - 2¹⁴ = 1055105113 is a prime.

It is a super-2 number, since 2×1055121497² = 2226562746863042018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1055121491) 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 3 ways as a sum of consecutive naturals, for example, 974618 + ... + 975699.

It is an arithmetic number, because the mean of its divisors is an integer number (264268089).

Almost surely, 2^1055121497 is an apocalyptic number.

It is an amenable number.

1055121497 is a deficient number, since it is larger than the sum of its proper divisors (1950859).

1055121497 is an equidigital number, since it uses as much as digits as its factorization.

1055121497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1950858.

The product of its (nonzero) digits is 12600, while the sum is 35.

The square root of 1055121497 is about 32482.6337756038. The cubic root of 1055121497 is about 1018.0462077108.

Adding to 1055121497 its reverse (7941215501), we get a palindrome (8996336998).

The spelling of 1055121497 in words is "one billion, fifty-five million, one hundred twenty-one thousand, four hundred ninety-seven".