1240145430 has 16 divisors (see below), whose sum is σ = 2976349104. Its totient is φ = 330705440.

The previous prime is 1240145419. The next prime is 1240145437. The reversal of 1240145430 is 345410421.

It is a self number, because there is not a number n which added to its sum of digits gives 1240145430.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240145437) 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, 20669061 + ... + 20669120.

It is an arithmetic number, because the mean of its divisors is an integer number (186021819).

Almost surely, 2^1240145430 is an apocalyptic number.

1240145430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1240145430 is an abundant number, since it is smaller than the sum of its proper divisors (1736203674).

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

1240145430 is a wasteful number, since it uses less digits than its factorization.

1240145430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41338191.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 1240145430 is about 35215.6986300144. The cubic root of 1240145430 is about 1074.3790695730.

Adding to 1240145430 its reverse (345410421), we get a palindrome (1585555851).

The spelling of 1240145430 in words is "one billion, two hundred forty million, one hundred forty-five thousand, four hundred thirty".