1205452340 has 24 divisors (see below), whose sum is σ = 2664684960. Its totient is φ = 456802848.

The previous prime is 1205452307. The next prime is 1205452343. The reversal of 1205452340 is 432545021.

It is a happy number.

It is a super-2 number, since 2×1205452340² = 2906230688022951200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205452343) 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, 1585742 + ... + 1586501.

It is an arithmetic number, because the mean of its divisors is an integer number (111028540).

Almost surely, 2^1205452340 is an apocalyptic number.

1205452340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1205452340 is an abundant number, since it is smaller than the sum of its proper divisors (1459232620).

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

1205452340 is a wasteful number, since it uses less digits than its factorization.

1205452340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3172271 (or 3172269 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 1205452340 is about 34719.6247099533. The cubic root of 1205452340 is about 1064.2655754896.

Adding to 1205452340 its reverse (432545021), we get a palindrome (1637997361).

The spelling of 1205452340 in words is "one billion, two hundred five million, four hundred fifty-two thousand, three hundred forty".