1245261 has 4 divisors (see below), whose sum is σ = 1660352. Its totient is φ = 830172.

The previous prime is 1245227. The next prime is 1245281. The reversal of 1245261 is 1625421.

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.

It is a de Polignac number, because none of the positive numbers 2^k-1245261 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207541 + ... + 207546.

It is an arithmetic number, because the mean of its divisors is an integer number (415088).

2^1245261 is an apocalyptic number.

It is an amenable number.

1245261 is a deficient number, since it is larger than the sum of its proper divisors (415091).

1245261 is an equidigital number, since it uses as much as digits as its factorization.

1245261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415090.

The product of its digits is 480, while the sum is 21.

The square root of 1245261 is about 1115.9126309886. The cubic root of 1245261 is about 107.5854305577.

The spelling of 1245261 in words is "one million, two hundred forty-five thousand, two hundred sixty-one".