1210625081 has 8 divisors (see below), whose sum is σ = 1254090600. Its totient is φ = 1167823360.

The previous prime is 1210625027. The next prime is 1210625153. The reversal of 1210625081 is 1805260121.

It can be written as a sum of positive squares in 4 ways, for example, as 24167056 + 1186458025 = 4916^2 + 34445^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1210625081 - 2¹⁰ = 1210624057 is a prime.

It is a super-2 number, since 2×1210625081² = 2931226173492513122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1210625081.

It is not an unprimeable number, because it can be changed into a prime (1210625011) 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, 162236 + ... + 169533.

It is an arithmetic number, because the mean of its divisors is an integer number (156761325).

Almost surely, 2^1210625081 is an apocalyptic number.

It is an amenable number.

1210625081 is a deficient number, since it is larger than the sum of its proper divisors (43465519).

1210625081 is an equidigital number, since it uses as much as digits as its factorization.

1210625081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331899.

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 1210625081 is about 34794.0380094062. The cubic root of 1210625081 is about 1065.7857004154.

The spelling of 1210625081 in words is "one billion, two hundred ten million, six hundred twenty-five thousand, eighty-one".