121245739 has 2 divisors, whose sum is σ = 121245740. Its totient is φ = 121245738.

The previous prime is 121245731. The next prime is 121245749. The reversal of 121245739 is 937542121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121245739 - 2³ = 121245731 is a prime.

It is a super-2 number, since 2×121245739² = 29401058451312242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121245731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60622869 + 60622870.

It is an arithmetic number, because the mean of its divisors is an integer number (60622870).

Almost surely, 2^121245739 is an apocalyptic number.

121245739 is a deficient number, since it is larger than the sum of its proper divisors (1).

121245739 is an equidigital number, since it uses as much as digits as its factorization.

121245739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 34.

The square root of 121245739 is about 11011.1642890296. The cubic root of 121245739 is about 494.9433516781.

The spelling of 121245739 in words is "one hundred twenty-one million, two hundred forty-five thousand, seven hundred thirty-nine".