121525247 has 2 divisors, whose sum is σ = 121525248. Its totient is φ = 121525246.

The previous prime is 121525223. The next prime is 121525291. The reversal of 121525247 is 742525121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121525247 - 2²² = 117330943 is a prime.

It is a super-2 number, since 2×121525247² = 29536771316822018, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121525447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60762623 + 60762624.

It is an arithmetic number, because the mean of its divisors is an integer number (60762624).

Almost surely, 2^121525247 is an apocalyptic number.

121525247 is a deficient number, since it is larger than the sum of its proper divisors (1).

121525247 is an equidigital number, since it uses as much as digits as its factorization.

121525247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5600, while the sum is 29.

The square root of 121525247 is about 11023.8490102142. The cubic root of 121525247 is about 495.3233910312.

It can be divided in two parts, 1215 and 25247, that added together give a palindrome (26462).

The spelling of 121525247 in words is "one hundred twenty-one million, five hundred twenty-five thousand, two hundred forty-seven".