1273621 has 4 divisors (see below), whose sum is σ = 1285632. Its totient is φ = 1261612.

The previous prime is 1273609. The next prime is 1273637. The reversal of 1273621 is 1263721.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1263721 = 59 ⋅21419.

It is a cyclic number.

It is not a de Polignac number, because 1273621 - 2⁹ = 1273109 is a prime.

It is a super-2 number, since 2×1273621² = 3244220903282, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1273592 and 1273601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1273681) 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, 5845 + ... + 6058.

It is an arithmetic number, because the mean of its divisors is an integer number (321408).

2^1273621 is an apocalyptic number.

It is an amenable number.

1273621 is a deficient number, since it is larger than the sum of its proper divisors (12011).

1273621 is a wasteful number, since it uses less digits than its factorization.

1273621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12010.

The product of its digits is 504, while the sum is 22.

The square root of 1273621 is about 1128.5481824007. The cubic root of 1273621 is about 108.3960368099.

The spelling of 1273621 in words is "one million, two hundred seventy-three thousand, six hundred twenty-one".