254638487 has 4 divisors (see below), whose sum is σ = 255704160. Its totient is φ = 253572816.

The previous prime is 254638469. The next prime is 254638507. The reversal of 254638487 is 784836452.

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

It is a cyclic number.

It is not a de Polignac number, because 254638487 - 2²⁶ = 187529623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (254638187) 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, 532478 + ... + 532955.

It is an arithmetic number, because the mean of its divisors is an integer number (63926040).

Almost surely, 2^254638487 is an apocalyptic number.

254638487 is a deficient number, since it is larger than the sum of its proper divisors (1065673).

254638487 is a wasteful number, since it uses less digits than its factorization.

254638487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065672.

The product of its digits is 1290240, while the sum is 47.

The square root of 254638487 is about 15957.3959968411. The cubic root of 254638487 is about 633.8327593126.

The spelling of 254638487 in words is "two hundred fifty-four million, six hundred thirty-eight thousand, four hundred eighty-seven".