612725121 has 32 divisors (see below), whose sum is σ = 923788800. Its totient is φ = 401328720.

The previous prime is 612725119. The next prime is 612725123. The reversal of 612725121 is 121527216.

612725121 is a `hidden beast` number, since 612 + 7 + 25 + 1 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (612725119) and next prime (612725123).

It is not a de Polignac number, because 612725121 - 2¹ = 612725119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (612725123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 377650 + ... + 379268.

It is an arithmetic number, because the mean of its divisors is an integer number (28868400).

Almost surely, 2^612725121 is an apocalyptic number.

It is an amenable number.

612725121 is a deficient number, since it is larger than the sum of its proper divisors (311063679).

612725121 is a wasteful number, since it uses less digits than its factorization.

612725121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1866 (or 1860 counting only the distinct ones).

The product of its digits is 1680, while the sum is 27.

The square root of 612725121 is about 24753.2850547155. The cubic root of 612725121 is about 849.3536590499.

The spelling of 612725121 in words is "six hundred twelve million, seven hundred twenty-five thousand, one hundred twenty-one".