1240420030 has 16 divisors (see below), whose sum is σ = 2235317760. Its totient is φ = 495598752.

The previous prime is 1240420021. The next prime is 1240420033. The reversal of 1240420030 is 300240421.

It is a junction number, because it is equal to n+sod(n) for n = 1240419986 and 1240420013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240420033) 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, 61950 + ... + 79489.

It is an arithmetic number, because the mean of its divisors is an integer number (139707360).

Almost surely, 2^1240420030 is an apocalyptic number.

1240420030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1240420030 is a deficient number, since it is larger than the sum of its proper divisors (994897730).

1240420030 is a wasteful number, since it uses less digits than its factorization.

1240420030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142323.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 1240420030 is about 35219.5972435802. The cubic root of 1240420030 is about 1074.4583620798.

Adding to 1240420030 its reverse (300240421), we get a palindrome (1540660451).

The spelling of 1240420030 in words is "one billion, two hundred forty million, four hundred twenty thousand, thirty".