1201523340 has 48 divisors (see below), whose sum is σ = 3367955808. Its totient is φ = 320054784.

The previous prime is 1201523339. The next prime is 1201523347. The reversal of 1201523340 is 433251021.

1201523340 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (1201523347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46674 + ... + 67686.

It is an arithmetic number, because the mean of its divisors is an integer number (70165746).

Almost surely, 2^1201523340 is an apocalyptic number.

1201523340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201523340 is an abundant number, since it is smaller than the sum of its proper divisors (2166432468).

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

1201523340 is a wasteful number, since it uses less digits than its factorization.

1201523340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21978 (or 21976 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1201523340 is about 34662.9966967658. The cubic root of 1201523340 is about 1063.1080430149.

Adding to 1201523340 its reverse (433251021), we get a palindrome (1634774361).

The spelling of 1201523340 in words is "one billion, two hundred one million, five hundred twenty-three thousand, three hundred forty".