1270421 has 2 divisors, whose sum is σ = 1270422. Its totient is φ = 1270420.

The previous prime is 1270417. The next prime is 1270429. The reversal of 1270421 is 1240721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1234321 + 36100 = 1111^2 + 190^2 .

It is a cyclic number.

It is not a de Polignac number, because 1270421 - 2² = 1270417 is a prime.

It is a super-2 number, since 2×1270421² = 3227939034482, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1270421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1270429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635210 + 635211.

It is an arithmetic number, because the mean of its divisors is an integer number (635211).

2^1270421 is an apocalyptic number.

It is an amenable number.

1270421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1270421 is an equidigital number, since it uses as much as digits as its factorization.

1270421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 1270421 is about 1127.1295400263. The cubic root of 1270421 is about 108.3051782191.

The spelling of 1270421 in words is "one million, two hundred seventy thousand, four hundred twenty-one".