3651487 has 4 divisors (see below), whose sum is σ = 4173136. Its totient is φ = 3129840.

The previous prime is 3651467. The next prime is 3651491. The reversal of 3651487 is 7841563.

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

It is a de Polignac number, because none of the positive numbers 2^k-3651487 is a prime.

It is a super-2 number, since 2×3651487² = 26666714622338, which contains 22 as substring.

It is a Duffinian number.

3651487 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3651407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260814 + ... + 260827.

It is an arithmetic number, because the mean of its divisors is an integer number (1043284).

Almost surely, 2^3651487 is an apocalyptic number.

3651487 is a deficient number, since it is larger than the sum of its proper divisors (521649).

3651487 is an equidigital number, since it uses as much as digits as its factorization.

3651487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521648.

The product of its digits is 20160, while the sum is 34.

The square root of 3651487 is about 1910.8864435125. The cubic root of 3651487 is about 153.9890783282.

The spelling of 3651487 in words is "three million, six hundred fifty-one thousand, four hundred eighty-seven".