5401581 has 8 divisors (see below), whose sum is σ = 7273824. Its totient is φ = 3565200.

The previous prime is 5401559. The next prime is 5401603. The reversal of 5401581 is 1851045.

It is an interprime number because it is at equal distance from previous prime (5401559) and next prime (5401603).

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

It is not a de Polignac number, because 5401581 - 2¹⁵ = 5368813 is a prime.

It is a super-2 number, since 2×5401581² = 58354154599122, which contains 22 as substring.

5401581 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5400581) 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, 8611 + ... + 9216.

It is an arithmetic number, because the mean of its divisors is an integer number (909228).

Almost surely, 2^5401581 is an apocalyptic number.

It is an amenable number.

5401581 is a deficient number, since it is larger than the sum of its proper divisors (1872243).

5401581 is a wasteful number, since it uses less digits than its factorization.

5401581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17931.

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

The square root of 5401581 is about 2324.1301598663. The cubic root of 5401581 is about 175.4581843704.

The spelling of 5401581 in words is "five million, four hundred one thousand, five hundred eighty-one".