1012420420 has 96 divisors (see below), whose sum is σ = 2386298880. Its totient is φ = 357651840.

The previous prime is 1012420391. The next prime is 1012420439. The reversal of 1012420420 is 240242101.

It is a junction number, because it is equal to n+sod(n) for n = 1012420394 and 1012420403.

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, 1850587 + ... + 1851133.

It is an arithmetic number, because the mean of its divisors is an integer number (24857280).

Almost surely, 2^1012420420 is an apocalyptic number.

1012420420 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 1012420420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1193149440).

1012420420 is an abundant number, since it is smaller than the sum of its proper divisors (1373878460).

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

1012420420 is a wasteful number, since it uses less digits than its factorization.

1012420420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793 (or 791 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 1012420420 is about 31818.5546497637. The cubic root of 1012420420 is about 1004.1231165455.

Adding to 1012420420 its reverse (240242101), we get a palindrome (1252662521).

The spelling of 1012420420 in words is "one billion, twelve million, four hundred twenty thousand, four hundred twenty".