1249421 has 6 divisors (see below), whose sum is σ = 1319022. Its totient is φ = 1183320.

The previous prime is 1249411. The next prime is 1249427.

1249421 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 902500 + 346921 = 950^2 + 589^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1249421 is a prime.

It is a super-2 number, since 2×1249421² = 3122105670482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1370 + ... + 2091.

It is an arithmetic number, because the mean of its divisors is an integer number (219837).

2^1249421 is an apocalyptic number.

It is an amenable number.

1249421 is a deficient number, since it is larger than the sum of its proper divisors (69601).

1249421 is an equidigital number, since it uses as much as digits as its factorization.

1249421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3499 (or 3480 counting only the distinct ones).

The product of its digits is 576, while the sum is 23.

The square root of 1249421 is about 1117.7750220863. The cubic root of 1249421 is about 107.7050996971.

The spelling of 1249421 in words is "one million, two hundred forty-nine thousand, four hundred twenty-one".