1245555041 has 4 divisors (see below), whose sum is σ = 1299709632. Its totient is φ = 1191400452.

The previous prime is 1245555011. The next prime is 1245555053. The reversal of 1245555041 is 1405555421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1405555421 = 331 ⋅4246391.

It is a cyclic number.

It is not a de Polignac number, because 1245555041 - 2¹⁰ = 1245554017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1245554989 and 1245555007.

It is not an unprimeable number, because it can be changed into a prime (1245555011) 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, 27077261 + ... + 27077306.

It is an arithmetic number, because the mean of its divisors is an integer number (324927408).

Almost surely, 2^1245555041 is an apocalyptic number.

It is an amenable number.

1245555041 is a deficient number, since it is larger than the sum of its proper divisors (54154591).

1245555041 is an equidigital number, since it uses as much as digits as its factorization.

1245555041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54154590.

The product of its (nonzero) digits is 20000, while the sum is 32.

The square root of 1245555041 is about 35292.4218636239. The cubic root of 1245555041 is about 1075.9389786915.

The spelling of 1245555041 in words is "one billion, two hundred forty-five million, five hundred fifty-five thousand, forty-one".