1421931 has 24 divisors (see below), whose sum is σ = 2339280. Its totient is φ = 763392.

The previous prime is 1421911. The next prime is 1421933. The reversal of 1421931 is 1391241.

It is not a de Polignac number, because 1421931 - 2⁶ = 1421867 is a prime.

It is a super-2 number, since 2×1421931² = 4043775537522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 1421898 and 1421907.

It is not an unprimeable number, because it can be changed into a prime (1421933) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2215 + ... + 2783.

It is an arithmetic number, because the mean of its divisors is an integer number (97470).

2^1421931 is an apocalyptic number.

1421931 is a deficient number, since it is larger than the sum of its proper divisors (917349).

1421931 is a wasteful number, since it uses less digits than its factorization.

1421931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603 (or 596 counting only the distinct ones).

The product of its digits is 216, while the sum is 21.

The square root of 1421931 is about 1192.4474831203. The cubic root of 1421931 is about 112.4500123600.

It can be divided in two parts, 14 and 21931, that added together give a triangular number (21945 = T₂₀₉).

The spelling of 1421931 in words is "one million, four hundred twenty-one thousand, nine hundred thirty-one".