1207421 has 4 divisors (see below), whose sum is σ = 1240092. Its totient is φ = 1174752.

The previous prime is 1207417. The next prime is 1207429. The reversal of 1207421 is 1247021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1247021 = 103 ⋅12107.

It can be written as a sum of positive squares in 2 ways, for example, as 972196 + 235225 = 986^2 + 485^2 .

It is a cyclic number.

It is not a de Polignac number, because 1207421 - 2² = 1207417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1207421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1207429) 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, 16280 + ... + 16353.

It is an arithmetic number, because the mean of its divisors is an integer number (310023).

2^1207421 is an apocalyptic number.

It is an amenable number.

1207421 is a deficient number, since it is larger than the sum of its proper divisors (32671).

1207421 is an equidigital number, since it uses as much as digits as its factorization.

1207421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32670.

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

The square root of 1207421 is about 1098.8271019592. The cubic root of 1207421 is about 106.4844621619.

The spelling of 1207421 in words is "one million, two hundred seven thousand, four hundred twenty-one".