1421761 has 8 divisors (see below), whose sum is σ = 1642464. Its totient is φ = 1216320.

The previous prime is 1421759. The next prime is 1421773. The reversal of 1421761 is 1671241.

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

It is a cyclic number.

It is not a de Polignac number, because 1421761 - 2¹ = 1421759 is a prime.

It is a super-2 number, since 2×1421761² = 4042808682242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1421711) 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, 3615 + ... + 3988.

It is an arithmetic number, because the mean of its divisors is an integer number (205308).

2^1421761 is an apocalyptic number.

1421761 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1421761 is a deficient number, since it is larger than the sum of its proper divisors (220703).

1421761 is a wasteful number, since it uses less digits than its factorization.

1421761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7631.

The product of its digits is 336, while the sum is 22.

The square root of 1421761 is about 1192.3761990245. The cubic root of 1421761 is about 112.4455308335.

The spelling of 1421761 in words is "one million, four hundred twenty-one thousand, seven hundred sixty-one".