15121145 has 8 divisors (see below), whose sum is σ = 19541256. Its totient is φ = 11166336.

The previous prime is 15121111. The next prime is 15121157. The reversal of 15121145 is 54112151.

It can be written as a sum of positive squares in 4 ways, for example, as 436921 + 14684224 = 661^2 + 3832^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 15121145 - 2⁶ = 15121081 is a prime.

It is a super-2 number, since 2×15121145² = 457298052222050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116252 + ... + 116381.

It is an arithmetic number, because the mean of its divisors is an integer number (2442657).

Almost surely, 2^15121145 is an apocalyptic number.

It is an amenable number.

15121145 is a deficient number, since it is larger than the sum of its proper divisors (4420111).

15121145 is a wasteful number, since it uses less digits than its factorization.

15121145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232651.

The product of its digits is 200, while the sum is 20.

The square root of 15121145 is about 3888.5916473705. The cubic root of 15121145 is about 247.2833597247.

Adding to 15121145 its reverse (54112151), we get a palindrome (69233296).

The spelling of 15121145 in words is "fifteen million, one hundred twenty-one thousand, one hundred forty-five".