1345521111 has 8 divisors (see below), whose sum is σ = 1957121664. Its totient is φ = 815467320.

The previous prime is 1345521109. The next prime is 1345521139. The reversal of 1345521111 is 1111255431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1345521111 - 2¹ = 1345521109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1345521101) 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, 20386651 + ... + 20386716.

It is an arithmetic number, because the mean of its divisors is an integer number (244640208).

Almost surely, 2^1345521111 is an apocalyptic number.

1345521111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1345521111 is a deficient number, since it is larger than the sum of its proper divisors (611600553).

1345521111 is a wasteful number, since it uses less digits than its factorization.

1345521111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40773381.

The product of its digits is 600, while the sum is 24.

The square root of 1345521111 is about 36681.3455451133. The cubic root of 1345521111 is about 1103.9858459184.

Adding to 1345521111 its reverse (1111255431), we get a palindrome (2456776542).

The spelling of 1345521111 in words is "one billion, three hundred forty-five million, five hundred twenty-one thousand, one hundred eleven".