1055721494 has 4 divisors (see below), whose sum is σ = 1583582244. Its totient is φ = 527860746.

The previous prime is 1055721463. The next prime is 1055721517. The reversal of 1055721494 is 4941275501.

1055721494 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×1055721494² = 2229095745787184072, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 263930372 + ... + 263930375.

It is an arithmetic number, because the mean of its divisors is an integer number (395895561).

Almost surely, 2^1055721494 is an apocalyptic number.

1055721494 is a deficient number, since it is larger than the sum of its proper divisors (527860750).

1055721494 is an equidigital number, since it uses as much as digits as its factorization.

1055721494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527860749.

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 1055721494 is about 32491.8681211161. The cubic root of 1055721494 is about 1018.2391424981.

Adding to 1055721494 its reverse (4941275501), we get a palindrome (5996996995).

The spelling of 1055721494 in words is "one billion, fifty-five million, seven hundred twenty-one thousand, four hundred ninety-four".