1051240 has 32 divisors (see below), whose sum is σ = 2426760. Its totient is φ = 409600.

The previous prime is 1051181. The next prime is 1051247. The reversal of 1051240 is 421501.

It can be written as a sum of positive squares in 4 ways, for example, as 799236 + 252004 = 894^2 + 502^2 .

It is a super-2 number, since 2×1051240² = 2210211075200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1051240.

It is not an unprimeable number, because it can be changed into a prime (1051247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1320 + ... + 1960.

2^1051240 is an apocalyptic number.

1051240 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 1051240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1213380).

1051240 is an abundant number, since it is smaller than the sum of its proper divisors (1375520).

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

1051240 is a wasteful number, since it uses less digits than its factorization.

1051240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693 (or 689 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 1051240 is about 1025.2999561104. The cubic root of 1051240 is about 101.6796304649.

Adding to 1051240 its reverse (421501), we get a palindrome (1472741).

The spelling of 1051240 in words is "one million, fifty-one thousand, two hundred forty".