1260421 has 4 divisors (see below), whose sum is σ = 1265344. Its totient is φ = 1255500.

The previous prime is 1260419. The next prime is 1260437. The reversal of 1260421 is 1240621.

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 cyclic number.

It is not a de Polignac number, because 1260421 - 2¹ = 1260419 is a prime.

It is a super-2 number, since 2×1260421² = 3177322194482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1260395 and 1260404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1260401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2055 + ... + 2596.

It is an arithmetic number, because the mean of its divisors is an integer number (316336).

2^1260421 is an apocalyptic number.

It is an amenable number.

1260421 is a deficient number, since it is larger than the sum of its proper divisors (4923).

1260421 is an equidigital number, since it uses as much as digits as its factorization.

1260421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4922.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1260421 is about 1122.6847286750. The cubic root of 1260421 is about 108.0202579740.

It can be divided in two parts, 1260 and 421, that added together give a square (1681 = 41²).

The spelling of 1260421 in words is "one million, two hundred sixty thousand, four hundred twenty-one".