1421917 has 8 divisors (see below), whose sum is σ = 1648512. Its totient is φ = 1201200.

The previous prime is 1421911. The next prime is 1421933. The reversal of 1421917 is 7191241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1421917 - 2³ = 1421909 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1421891 and 1421900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 934 + ... + 1927.

It is an arithmetic number, because the mean of its divisors is an integer number (206064).

2^1421917 is an apocalyptic number.

It is an amenable number.

1421917 is a deficient number, since it is larger than the sum of its proper divisors (226595).

1421917 is an equidigital number, since it uses as much as digits as its factorization.

1421917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2939.

The product of its digits is 504, while the sum is 25.

The square root of 1421917 is about 1192.4416128264. The cubic root of 1421917 is about 112.4496433066.

The spelling of 1421917 in words is "one million, four hundred twenty-one thousand, nine hundred seventeen".