1212125072539 has 4 divisors (see below), whose sum is σ = 1212136684560. Its totient is φ = 1212113460520.

The previous prime is 1212125072537. The next prime is 1212125072621. The reversal of 1212125072539 is 9352705212121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1212125072539 - 2¹ = 1212125072537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212125072533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5647999 + ... + 5858680.

It is an arithmetic number, because the mean of its divisors is an integer number (303034171140).

Almost surely, 2^{1212125072539} is an apocalyptic number.

1212125072539 is a deficient number, since it is larger than the sum of its proper divisors (11612021).

1212125072539 is a wasteful number, since it uses less digits than its factorization.

1212125072539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11612020.

The product of its (nonzero) digits is 75600, while the sum is 40.

The spelling of 1212125072539 in words is "one trillion, two hundred twelve billion, one hundred twenty-five million, seventy-two thousand, five hundred thirty-nine".