612129501 has 8 divisors (see below), whose sum is σ = 906858560. Its totient is φ = 408086316.

The previous prime is 612129499. The next prime is 612129527. The reversal of 612129501 is 105921216.

It is not a de Polignac number, because 612129501 - 2¹ = 612129499 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 22671463 = 612129501 / (6 + 1 + 2 + 1 + 2 + 9 + 5 + 0 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612129541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11335705 + ... + 11335758.

It is an arithmetic number, because the mean of its divisors is an integer number (113357320).

Almost surely, 2^612129501 is an apocalyptic number.

It is an amenable number.

612129501 is a deficient number, since it is larger than the sum of its proper divisors (294729059).

612129501 is a wasteful number, since it uses less digits than its factorization.

612129501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22671472 (or 22671466 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 612129501 is about 24741.2509990906. The cubic root of 612129501 is about 849.0783555896.

The spelling of 612129501 in words is "six hundred twelve million, one hundred twenty-nine thousand, five hundred one".