121147245 has 40 divisors (see below), whose sum is σ = 219673080. Its totient is φ = 63866880.

The previous prime is 121147231. The next prime is 121147259. The reversal of 121147245 is 542741121.

It is an interprime number because it is at equal distance from previous prime (121147231) and next prime (121147259).

It can be written as a sum of positive squares in 4 ways, for example, as 9696996 + 111450249 = 3114^2 + 10557^2 .

It is not a de Polignac number, because 121147245 - 2⁸ = 121146989 is a prime.

It is a super-3 number, since 3×121147245³ (a number of 25 digits) contains 333 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 34365 + ... + 37725.

It is an arithmetic number, because the mean of its divisors is an integer number (5491827).

Almost surely, 2^121147245 is an apocalyptic number.

121147245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121147245 is a deficient number, since it is larger than the sum of its proper divisors (98525835).

121147245 is an equidigital number, since it uses as much as digits as its factorization.

121147245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3467 (or 3458 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 121147245 is about 11006.6909196179. The cubic root of 121147245 is about 494.8092929275.

Adding to 121147245 its reverse (542741121), we get a palindrome (663888366).

The spelling of 121147245 in words is "one hundred twenty-one million, one hundred forty-seven thousand, two hundred forty-five".