121540345 has 16 divisors (see below), whose sum is σ = 148534848. Its totient is φ = 95451840.

The previous prime is 121540339. The next prime is 121540351. The reversal of 121540345 is 543045121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121540339) and next prime (121540351).

It is not a de Polignac number, because 121540345 - 2⁵ = 121540313 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154042 + ... + 154828.

It is an arithmetic number, because the mean of its divisors is an integer number (9283428).

Almost surely, 2^121540345 is an apocalyptic number.

It is an amenable number.

121540345 is a deficient number, since it is larger than the sum of its proper divisors (26994503).

121540345 is an equidigital number, since it uses as much as digits as its factorization.

121540345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320.

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

The square root of 121540345 is about 11024.5337769903. The cubic root of 121540345 is about 495.3439027714.

Adding to 121540345 its reverse (543045121), we get a palindrome (664585466).

The spelling of 121540345 in words is "one hundred twenty-one million, five hundred forty thousand, three hundred forty-five".