121012539 has 8 divisors (see below), whose sum is σ = 169842240. Its totient is φ = 76428936.

The previous prime is 121012517. The next prime is 121012571. The reversal of 121012539 is 935210121.

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

It is not a de Polignac number, because 121012539 - 2¹³ = 121004347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121012139) 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, 1061457 + ... + 1061570.

It is an arithmetic number, because the mean of its divisors is an integer number (21230280).

Almost surely, 2^121012539 is an apocalyptic number.

121012539 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

121012539 is a deficient number, since it is larger than the sum of its proper divisors (48829701).

121012539 is a wasteful number, since it uses less digits than its factorization.

121012539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2123049.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 121012539 is about 11000.5699397804. The cubic root of 121012539 is about 494.6258288561.

The spelling of 121012539 in words is "one hundred twenty-one million, twelve thousand, five hundred thirty-nine".