1051232420 has 48 divisors (see below), whose sum is σ = 2547487488. Its totient is φ = 356918400.

The previous prime is 1051232407. The next prime is 1051232447. The reversal of 1051232420 is 242321501.

It is a super-2 number, since 2×1051232420² = 2210179201718112800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1051232392 and 1051232401.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22031 + ... + 50870.

It is an arithmetic number, because the mean of its divisors is an integer number (53072656).

Almost surely, 2^1051232420 is an apocalyptic number.

1051232420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1051232420 is an abundant number, since it is smaller than the sum of its proper divisors (1496255068).

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

1051232420 is a wasteful number, since it uses less digits than its factorization.

1051232420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73020 (or 73018 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1051232420 is about 32422.7145686477. The cubic root of 1051232420 is about 1016.7938607621.

Adding to 1051232420 its reverse (242321501), we get a palindrome (1293553921).

The spelling of 1051232420 in words is "one billion, fifty-one million, two hundred thirty-two thousand, four hundred twenty".