1261751 has 4 divisors (see below), whose sum is σ = 1268904. Its totient is φ = 1254600.

The previous prime is 1261747. The next prime is 1261759. The reversal of 1261751 is 1571621.

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

It is a cyclic number.

It is not a de Polignac number, because 1261751 - 2² = 1261747 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261759) 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, 3305 + ... + 3666.

It is an arithmetic number, because the mean of its divisors is an integer number (317226).

2^1261751 is an apocalyptic number.

1261751 is a deficient number, since it is larger than the sum of its proper divisors (7153).

1261751 is an equidigital number, since it uses as much as digits as its factorization.

1261751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7152.

The product of its digits is 420, while the sum is 23.

The square root of 1261751 is about 1123.2769026380. The cubic root of 1261751 is about 108.0582390507.

The spelling of 1261751 in words is "one million, two hundred sixty-one thousand, seven hundred fifty-one".