345412521 has 6 divisors (see below), whose sum is σ = 498929210. Its totient is φ = 230275008.

The previous prime is 345412513. The next prime is 345412549. The reversal of 345412521 is 125214543.

It can be written as a sum of positive squares in only one way, i.e., 325297296 + 20115225 = 18036^2 + 4485^2 .

It is not a de Polignac number, because 345412521 - 2³ = 345412513 is a prime.

It is a super-3 number, since 3×345412521³ (a number of 27 digits) contains 333 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345412621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19189576 + ... + 19189593.

Almost surely, 2^345412521 is an apocalyptic number.

It is an amenable number.

345412521 is a deficient number, since it is larger than the sum of its proper divisors (153516689).

345412521 is a wasteful number, since it uses less digits than its factorization.

345412521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38379175 (or 38379172 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 345412521 is about 18585.2769955145. The cubic root of 345412521 is about 701.6373379401.

The spelling of 345412521 in words is "three hundred forty-five million, four hundred twelve thousand, five hundred twenty-one".