1051243240 has 32 divisors (see below), whose sum is σ = 2366253000. Its totient is φ = 420327424.

The previous prime is 1051243211. The next prime is 1051243247. The reversal of 1051243240 is 423421501.

It can be written as a sum of positive squares in 4 ways, for example, as 827022564 + 224220676 = 28758^2 + 14974^2 .

It is a super-2 number, since 2×1051243240² = 2210224699291395200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1051243247) 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, 153816 + ... + 160504.

Almost surely, 2^1051243240 is an apocalyptic number.

1051243240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1051243240 is an abundant number, since it is smaller than the sum of its proper divisors (1315009760).

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

1051243240 is a wasteful number, since it uses less digits than its factorization.

1051243240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10629 (or 10625 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1051243240 is about 32422.8814265481. The cubic root of 1051243240 is about 1016.7973492618.

Adding to 1051243240 its reverse (423421501), we get a palindrome (1474664741).

The spelling of 1051243240 in words is "one billion, fifty-one million, two hundred forty-three thousand, two hundred forty".