1415551 has 4 divisors (see below), whose sum is σ = 1428192. Its totient is φ = 1402912.

The previous prime is 1415507. The next prime is 1415567. The reversal of 1415551 is 1555141.

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: 1555141 = 7 ⋅222163.

It is a cyclic number.

It is not a de Polignac number, because 1415551 - 2⁹ = 1415039 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1415591) 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, 6151 + ... + 6376.

It is an arithmetic number, because the mean of its divisors is an integer number (357048).

2^1415551 is an apocalyptic number.

1415551 is a deficient number, since it is larger than the sum of its proper divisors (12641).

1415551 is a wasteful number, since it uses less digits than its factorization.

1415551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12640.

The product of its digits is 500, while the sum is 22.

The square root of 1415551 is about 1189.7693053697. The cubic root of 1415551 is about 112.2815778473.

The spelling of 1415551 in words is "one million, four hundred fifteen thousand, five hundred fifty-one".