345521025 has 48 divisors (see below), whose sum is σ = 636566400. Its totient is φ = 183746880.

The previous prime is 345520991. The next prime is 345521053. The reversal of 345521025 is 520125543.

It is a happy number.

345521025 is a `hidden beast` number, since 3 + 4 + 552 + 102 + 5 = 666.

It is not a de Polignac number, because 345521025 - 2¹¹ = 345518977 is a prime.

It is a super-3 number, since 3×345521025³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 345521025.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 375516 + ... + 376434.

It is an arithmetic number, because the mean of its divisors is an integer number (13261800).

Almost surely, 2^345521025 is an apocalyptic number.

It is an amenable number.

345521025 is a deficient number, since it is larger than the sum of its proper divisors (291045375).

345521025 is a wasteful number, since it uses less digits than its factorization.

345521025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1495 (or 1484 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 345521025 is about 18588.1958511309. The cubic root of 345521025 is about 701.7107983995.

Adding to 345521025 its reverse (520125543), we get a palindrome (865646568).

The spelling of 345521025 in words is "three hundred forty-five million, five hundred twenty-one thousand, twenty-five".