1201545345 has 128 divisors (see below), whose sum is σ = 2642669568. Its totient is φ = 449971200.

The previous prime is 1201545343. The next prime is 1201545347. The reversal of 1201545345 is 5435451021.

It is an interprime number because it is at equal distance from previous prime (1201545343) and next prime (1201545347).

It is not a de Polignac number, because 1201545345 - 2¹ = 1201545343 is a prime.

It is a super-2 number, since 2×1201545345² = 2887422432182338050, which contains 22 as substring.

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 127 ways as a sum of consecutive naturals, for example, 644715 + ... + 646575.

It is an arithmetic number, because the mean of its divisors is an integer number (20645856).

Almost surely, 2^1201545345 is an apocalyptic number.

1201545345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1201545345 is an abundant number, since it is smaller than the sum of its proper divisors (1441124223).

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

1201545345 is a wasteful number, since it uses less digits than its factorization.

1201545345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1943.

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 1201545345 is about 34663.3141087231. The cubic root of 1201545345 is about 1063.1145329845.

Adding to 1201545345 its reverse (5435451021), we get a palindrome (6636996366).

The spelling of 1201545345 in words is "one billion, two hundred one million, five hundred forty-five thousand, three hundred forty-five".