1051440 has 80 divisors (see below), whose sum is σ = 3520608. Its totient is φ = 258048.

The previous prime is 1051423. The next prime is 1051459. The reversal of 1051440 is 441501.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×1051440² = 2211052147200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2952 + ... + 3288.

2^1051440 is an apocalyptic number.

1051440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1051440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1760304).

1051440 is an abundant number, since it is smaller than the sum of its proper divisors (2469168).

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

1051440 is a wasteful number, since it uses less digits than its factorization.

1051440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366 (or 360 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1051440 is about 1025.3974839056. The cubic root of 1051440 is about 101.6860782905.

Adding to 1051440 its reverse (441501), we get a palindrome (1492941).

The spelling of 1051440 in words is "one million, fifty-one thousand, four hundred forty".