1260621 has 6 divisors (see below), whose sum is σ = 1820910. Its totient is φ = 840408.

The previous prime is 1260599. The next prime is 1260629.

It is a happy number.

1260621 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 1179396 + 81225 = 1086^2 + 285^2 .

It is not a de Polignac number, because 1260621 - 2¹³ = 1252429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1260594 and 1260603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1260629) 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 5 ways as a sum of consecutive naturals, for example, 70026 + ... + 70043.

It is an arithmetic number, because the mean of its divisors is an integer number (303485).

2^1260621 is an apocalyptic number.

It is an amenable number.

1260621 is a deficient number, since it is larger than the sum of its proper divisors (560289).

1260621 is a wasteful number, since it uses less digits than its factorization.

1260621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140075 (or 140072 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1260621 is about 1122.7737973430. The cubic root of 1260621 is about 108.0259711204.

It can be divided in two parts, 1260 and 621, that added together give a palindrome (1881).

The spelling of 1260621 in words is "one million, two hundred sixty thousand, six hundred twenty-one".