8401551 has 8 divisors (see below), whose sum is σ = 11216640. Its totient is φ = 5593752.

The previous prime is 8401543. The next prime is 8401559. The reversal of 8401551 is 1551048.

It is an interprime number because it is at equal distance from previous prime (8401543) and next prime (8401559).

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

It is not a de Polignac number, because 8401551 - 2³ = 8401543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8401559) 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, 2040 + ... + 4578.

It is an arithmetic number, because the mean of its divisors is an integer number (1402080).

Almost surely, 2^8401551 is an apocalyptic number.

8401551 is a deficient number, since it is larger than the sum of its proper divisors (2815089).

8401551 is a wasteful number, since it uses less digits than its factorization.

8401551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3645.

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 8401551 is about 2898.5429098083. The cubic root of 8401551 is about 203.2917819482.

Adding to 8401551 its reverse (1551048), we get a palindrome (9952599).

The spelling of 8401551 in words is "eight million, four hundred one thousand, five hundred fifty-one".