121430145 has 8 divisors (see below), whose sum is σ = 194288256. Its totient is φ = 64762736.

The previous prime is 121430143. The next prime is 121430147. The reversal of 121430145 is 541034121.

It is an interprime number because it is at equal distance from previous prime (121430143) and next prime (121430147).

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

It is a cyclic number.

It is not a de Polignac number, because 121430145 - 2¹ = 121430143 is a prime.

It is a super-2 number, since 2×121430145² = 29490560229442050, which contains 22 as substring.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121430143) 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, 4047657 + ... + 4047686.

It is an arithmetic number, because the mean of its divisors is an integer number (24286032).

Almost surely, 2^121430145 is an apocalyptic number.

121430145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121430145 is a deficient number, since it is larger than the sum of its proper divisors (72858111).

121430145 is an equidigital number, since it uses as much as digits as its factorization.

121430145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8095351.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 121430145 is about 11019.5346997956. The cubic root of 121430145 is about 495.1941489200.

Adding to 121430145 its reverse (541034121), we get a palindrome (662464266).

The spelling of 121430145 in words is "one hundred twenty-one million, four hundred thirty thousand, one hundred forty-five".