12540554 has 16 divisors (see below), whose sum is σ = 20912640. Its totient is φ = 5600880.

The previous prime is 12540529. The next prime is 12540581. The reversal of 12540554 is 45504521.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a plaindrome in base 15.

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, 6974 + ... + 8585.

It is an arithmetic number, because the mean of its divisors is an integer number (1307040).

Almost surely, 2^12540554 is an apocalyptic number.

12540554 is a deficient number, since it is larger than the sum of its proper divisors (8372086).

12540554 is a wasteful number, since it uses less digits than its factorization.

12540554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15605.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 12540554 is about 3541.2644634368. The cubic root of 12540554 is about 232.3301507404.

The spelling of 12540554 in words is "twelve million, five hundred forty thousand, five hundred fifty-four".