345121540 has 24 divisors (see below), whose sum is σ = 725202072. Its totient is φ = 137963520.

The previous prime is 345121537. The next prime is 345121541. The reversal of 345121540 is 45121543.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 30272004 + 314849536 = 5502^2 + 17744^2 .

It is not an unprimeable number, because it can be changed into a prime (345121541) 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, 35620 + ... + 44260.

It is an arithmetic number, because the mean of its divisors is an integer number (30216753).

Almost surely, 2^345121540 is an apocalyptic number.

It is an amenable number.

345121540 is an abundant number, since it is smaller than the sum of its proper divisors (380080532).

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

345121540 is a wasteful number, since it uses less digits than its factorization.

345121540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10647 (or 10645 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 345121540 is about 18577.4470797255. The cubic root of 345121540 is about 701.4402591056.

The spelling of 345121540 in words is "three hundred forty-five million, one hundred twenty-one thousand, five hundred forty".