15001481 has 4 divisors (see below), whose sum is σ = 16365264. Its totient is φ = 13637700.

The previous prime is 15001471. The next prime is 15001487. The reversal of 15001481 is 18410051.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 15001481 - 2⁶ = 15001417 is a prime.

It is a super-2 number, since 2×15001481² = 450088864386722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (15001487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 681875 + ... + 681896.

It is an arithmetic number, because the mean of its divisors is an integer number (4091316).

Almost surely, 2^15001481 is an apocalyptic number.

15001481 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

15001481 is a deficient number, since it is larger than the sum of its proper divisors (1363783).

15001481 is a wasteful number, since it uses less digits than its factorization.

15001481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363782.

The product of its (nonzero) digits is 160, while the sum is 20.

The square root of 15001481 is about 3873.1745377661. The cubic root of 15001481 is about 246.6293237439.

The spelling of 15001481 in words is "fifteen million, one thousand, four hundred eighty-one".