612707121 has 24 divisors (see below), whose sum is σ = 954011240. Its totient is φ = 376690176.

The previous prime is 612707077. The next prime is 612707141. The reversal of 612707121 is 121707216.

It can be written as a sum of positive squares in 4 ways, for example, as 66830625 + 545876496 = 8175^2 + 23364^2 .

It is not a de Polignac number, because 612707121 - 2¹³ = 612698929 is a prime.

It is a super-2 number, since 2×612707121² = 750820032248217282, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (612707141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 172455 + ... + 175971.

Almost surely, 2^612707121 is an apocalyptic number.

It is an amenable number.

612707121 is a deficient number, since it is larger than the sum of its proper divisors (341304119).

612707121 is a wasteful number, since it uses less digits than its factorization.

612707121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5025 (or 5022 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 27.

The square root of 612707121 is about 24752.9214639404. The cubic root of 612707121 is about 849.3453418262.

It can be divided in two parts, 6 and 12707121, that multiplied together give a triangular number (76242726 = T₁₂₃₄₈).

The spelling of 612707121 in words is "six hundred twelve million, seven hundred seven thousand, one hundred twenty-one".