1415921 has 4 divisors (see below), whose sum is σ = 1524852. Its totient is φ = 1306992.

The previous prime is 1415881. The next prime is 1415929. The reversal of 1415921 is 1295141.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1295141 = 239 ⋅5419.

It can be written as a sum of positive squares in 2 ways, for example, as 874225 + 541696 = 935^2 + 736^2 .

It is a cyclic number.

It is not a de Polignac number, because 1415921 - 2¹⁴ = 1399537 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 (1415929) 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, 54446 + ... + 54471.

It is an arithmetic number, because the mean of its divisors is an integer number (381213).

2^1415921 is an apocalyptic number.

It is an amenable number.

1415921 is a deficient number, since it is larger than the sum of its proper divisors (108931).

1415921 is a wasteful number, since it uses less digits than its factorization.

1415921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108930.

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

The square root of 1415921 is about 1189.9247875391. The cubic root of 1415921 is about 112.2913598014.

The spelling of 1415921 in words is "one million, four hundred fifteen thousand, nine hundred twenty-one".