1051055440 has 20 divisors (see below), whose sum is σ = 2443704084. Its totient is φ = 420422144.

The previous prime is 1051055393. The next prime is 1051055443. The reversal of 1051055440 is 445501501.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 700766784 + 350288656 = 26472^2 + 18716^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×1051055440² = 2209435075907187200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1051055443) 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, 6569017 + ... + 6569176.

Almost surely, 2^1051055440 is an apocalyptic number.

1051055440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1051055440 is an abundant number, since it is smaller than the sum of its proper divisors (1392648644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1051055440 is a wasteful number, since it uses less digits than its factorization.

1051055440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13138206 (or 13138200 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 1051055440 is about 32419.9851943211. The cubic root of 1051055440 is about 1016.7367968584.

Adding to 1051055440 its reverse (445501501), we get a palindrome (1496556941).

The spelling of 1051055440 in words is "one billion, fifty-one million, fifty-five thousand, four hundred forty".