1055081257 has 4 divisors (see below), whose sum is σ = 1055273616. Its totient is φ = 1054888900.

The previous prime is 1055081207. The next prime is 1055081263. The reversal of 1055081257 is 7521805501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1055081257 is a prime.

It is a super-2 number, since 2×1055081257² = 2226392917745400098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1055081207) 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, 87703 + ... + 99004.

It is an arithmetic number, because the mean of its divisors is an integer number (263818404).

Almost surely, 2^1055081257 is an apocalyptic number.

It is an amenable number.

1055081257 is a deficient number, since it is larger than the sum of its proper divisors (192359).

1055081257 is an equidigital number, since it uses as much as digits as its factorization.

1055081257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192358.

The product of its (nonzero) digits is 14000, while the sum is 34.

The square root of 1055081257 is about 32482.0143617972. The cubic root of 1055081257 is about 1018.0332655361.

Adding to 1055081257 its reverse (7521805501), we get a palindrome (8576886758).

The spelling of 1055081257 in words is "one billion, fifty-five million, eighty-one thousand, two hundred fifty-seven".