1051420520 has 128 divisors (see below), whose sum is σ = 2540419200. Its totient is φ = 390921216.

The previous prime is 1051420463. The next prime is 1051420547. The reversal of 1051420520 is 250241501.

It is a super-2 number, since 2×1051420520² = 2210970219754140800, 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 = 1051420492 and 1051420501.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5337062 + ... + 5337258.

It is an arithmetic number, because the mean of its divisors is an integer number (19847025).

Almost surely, 2^1051420520 is an apocalyptic number.

1051420520 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 1051420520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1270209600).

1051420520 is an abundant number, since it is smaller than the sum of its proper divisors (1488998680).

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

1051420520 is a wasteful number, since it uses less digits than its factorization.

1051420520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387 (or 383 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 1051420520 is about 32425.6151830617. The cubic root of 1051420520 is about 1016.8545030823.

The spelling of 1051420520 in words is "one billion, fifty-one million, four hundred twenty thousand, five hundred twenty".