15138901 has 4 divisors (see below), whose sum is σ = 15277900. Its totient is φ = 14999904.

The previous prime is 15138863. The next prime is 15138913. The reversal of 15138901 is 10983151.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3572100 + 11566801 = 1890^2 + 3401^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15138901 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15138901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15138941) 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, 69336 + ... + 69553.

It is an arithmetic number, because the mean of its divisors is an integer number (3819475).

Almost surely, 2^15138901 is an apocalyptic number.

It is an amenable number.

15138901 is a deficient number, since it is larger than the sum of its proper divisors (138999).

15138901 is a wasteful number, since it uses less digits than its factorization.

15138901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138998.

The product of its (nonzero) digits is 1080, while the sum is 28.

The square root of 15138901 is about 3890.8740663249. The cubic root of 15138901 is about 247.3801126676.

The spelling of 15138901 in words is "fifteen million, one hundred thirty-eight thousand, nine hundred one".