1210440641 has 4 divisors (see below), whose sum is σ = 1218150612. Its totient is φ = 1202730672.

The previous prime is 1210440617. The next prime is 1210440697. The reversal of 1210440641 is 1460440121.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 412943041 + 797497600 = 20321^2 + 28240^2 .

It is a cyclic number.

It is not a de Polignac number, because 1210440641 - 2³⁰ = 136698817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1210440041) 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, 3854750 + ... + 3855063.

It is an arithmetic number, because the mean of its divisors is an integer number (304537653).

Almost surely, 2^1210440641 is an apocalyptic number.

It is an amenable number.

1210440641 is a deficient number, since it is larger than the sum of its proper divisors (7709971).

1210440641 is an equidigital number, since it uses as much as digits as its factorization.

1210440641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7709970.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 1210440641 is about 34791.3874543686. The cubic root of 1210440641 is about 1065.7315731437.

Adding to 1210440641 its reverse (1460440121), we get a palindrome (2670880762).

The spelling of 1210440641 in words is "one billion, two hundred ten million, four hundred forty thousand, six hundred forty-one".