15072481 has 4 divisors (see below), whose sum is σ = 15106500. Its totient is φ = 15038464.

The previous prime is 15072469. The next prime is 15072493. The reversal of 15072481 is 18427051.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18427051 = 31 ⋅594421.

It is an interprime number because it is at equal distance from previous prime (15072469) and next prime (15072493).

It can be written as a sum of positive squares in 2 ways, for example, as 4477456 + 10595025 = 2116^2 + 3255^2 .

It is a cyclic number.

It is not a de Polignac number, because 15072481 - 2¹³ = 15064289 is a prime.

It is a super-2 number, since 2×15072481² = 454359366990722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15072581) 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, 16336 + ... + 17233.

It is an arithmetic number, because the mean of its divisors is an integer number (3776625).

Almost surely, 2^15072481 is an apocalyptic number.

It is an amenable number.

15072481 is a deficient number, since it is larger than the sum of its proper divisors (34019).

15072481 is an equidigital number, since it uses as much as digits as its factorization.

15072481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34018.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 15072481 is about 3882.3293265770. The cubic root of 15072481 is about 247.0177993697.

The spelling of 15072481 in words is "fifteen million, seventy-two thousand, four hundred eighty-one".