1234345521 has 8 divisors (see below), whose sum is σ = 1645960960. Its totient is φ = 822813552.

The previous prime is 1234345513. The next prime is 1234345529. The reversal of 1234345521 is 1255434321.

It is an interprime number because it is at equal distance from previous prime (1234345513) and next prime (1234345529).

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

It is not a de Polignac number, because 1234345521 - 2³ = 1234345513 is a prime.

It is a super-2 number, since 2×1234345521² = 3047217730425522882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1234345529) 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, 35040 + ... + 60798.

It is an arithmetic number, because the mean of its divisors is an integer number (205745120).

Almost surely, 2^1234345521 is an apocalyptic number.

It is an amenable number.

1234345521 is a deficient number, since it is larger than the sum of its proper divisors (411615439).

1234345521 is a wasteful number, since it uses less digits than its factorization.

1234345521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41735.

The product of its digits is 14400, while the sum is 30.

The square root of 1234345521 is about 35133.2537775823. The cubic root of 1234345521 is about 1072.7015673006.

Adding to 1234345521 its reverse (1255434321), we get a palindrome (2489779842).

The spelling of 1234345521 in words is "one billion, two hundred thirty-four million, three hundred forty-five thousand, five hundred twenty-one".