1421951 has 4 divisors (see below), whose sum is σ = 1424472. Its totient is φ = 1419432.

The previous prime is 1421933. The next prime is 1421963. The reversal of 1421951 is 1591241.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1421951 is a prime.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 20 + ... + 1686.

It is an arithmetic number, because the mean of its divisors is an integer number (356118).

2^1421951 is an apocalyptic number.

1421951 is a deficient number, since it is larger than the sum of its proper divisors (2521).

1421951 is an equidigital number, since it uses as much as digits as its factorization.

1421951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2520.

The product of its digits is 360, while the sum is 23.

The square root of 1421951 is about 1192.4558692044. The cubic root of 1421951 is about 112.4505395749.

The spelling of 1421951 in words is "one million, four hundred twenty-one thousand, nine hundred fifty-one".