12453987 has 48 divisors (see below), whose sum is σ = 21960960. Its totient is φ = 6223392.

The previous prime is 12453977. The next prime is 12454003. The reversal of 12453987 is 78935421.

It is not a de Polignac number, because 12453987 - 2⁶ = 12453923 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

Its product of digits (60480) is a multiple of the sum of its prime divisors (42).

It is not an unprimeable number, because it can be changed into a prime (12453907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 655464 + ... + 655482.

It is an arithmetic number, because the mean of its divisors is an integer number (457520).

Almost surely, 2^12453987 is an apocalyptic number.

12453987 is a deficient number, since it is larger than the sum of its proper divisors (9506973).

12453987 is an frugal number, since it uses more digits than its factorization.

12453987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70 (or 42 counting only the distinct ones).

The product of its digits is 60480, while the sum is 39.

The square root of 12453987 is about 3529.0206856860. The cubic root of 12453987 is about 231.7943269851.

The spelling of 12453987 in words is "twelve million, four hundred fifty-three thousand, nine hundred eighty-seven".