1012240420 has 12 divisors (see below), whose sum is σ = 2125704924. Its totient is φ = 404896160.

The previous prime is 1012240393. The next prime is 1012240421. The reversal of 1012240420 is 240422101.

It can be written as a sum of positive squares in 2 ways, for example, as 803495716 + 208744704 = 28346^2 + 14448^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1012240394 and 1012240403.

It is not an unprimeable number, because it can be changed into a prime (1012240421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25305991 + ... + 25306030.

It is an arithmetic number, because the mean of its divisors is an integer number (177142077).

Almost surely, 2^1012240420 is an apocalyptic number.

1012240420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1012240420 is an abundant number, since it is smaller than the sum of its proper divisors (1113464504).

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

1012240420 is a wasteful number, since it uses less digits than its factorization.

1012240420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50612030 (or 50612028 counting only the distinct ones).

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

The square root of 1012240420 is about 31815.7259857448. The cubic root of 1012240420 is about 1004.0636047492.

Adding to 1012240420 its reverse (240422101), we get a palindrome (1252662521).

The spelling of 1012240420 in words is "one billion, twelve million, two hundred forty thousand, four hundred twenty".