1204520340 has 24 divisors (see below), whose sum is σ = 3372657120. Its totient is φ = 321205408.

The previous prime is 1204520323. The next prime is 1204520377. The reversal of 1204520340 is 430254021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10037610 + ... + 10037729.

It is an arithmetic number, because the mean of its divisors is an integer number (140527380).

Almost surely, 2^1204520340 is an apocalyptic number.

1204520340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1204520340 is an abundant number, since it is smaller than the sum of its proper divisors (2168136780).

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

1204520340 is a wasteful number, since it uses less digits than its factorization.

1204520340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20075351 (or 20075349 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 1204520340 is about 34706.2003106073. The cubic root of 1204520340 is about 1063.9912244645.

Adding to 1204520340 its reverse (430254021), we get a palindrome (1634774361).

It can be divided in two parts, 12045 and 20340, that added together give a triangular number (32385 = T₂₅₄).

The spelling of 1204520340 in words is "one billion, two hundred four million, five hundred twenty thousand, three hundred forty".