1201545340 has 24 divisors (see below), whose sum is σ = 2524667040. Its totient is φ = 480347328.

The previous prime is 1201545307. The next prime is 1201545343. The reversal of 1201545340 is 435451021.

It is a happy number.

It is a super-2 number, since 2×1201545340² = 2887422408151431200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201545343) 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, 21594 + ... + 53566.

It is an arithmetic number, because the mean of its divisors is an integer number (105194460).

Almost surely, 2^1201545340 is an apocalyptic number.

1201545340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201545340 is an abundant number, since it is smaller than the sum of its proper divisors (1323121700).

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

1201545340 is a wasteful number, since it uses less digits than its factorization.

1201545340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33861 (or 33859 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1201545340 is about 34663.3140366007. The cubic root of 1201545340 is about 1063.1145315098.

Adding to 1201545340 its reverse (435451021), we get a palindrome (1636996361).

The spelling of 1201545340 in words is "one billion, two hundred one million, five hundred forty-five thousand, three hundred forty".