154131487 has 4 divisors (see below), whose sum is σ = 160832880. Its totient is φ = 147430096.

The previous prime is 154131463. The next prime is 154131493. The reversal of 154131487 is 784131451.

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 154131487 - 2⁷ = 154131359 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 (154131457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3350662 + ... + 3350707.

It is an arithmetic number, because the mean of its divisors is an integer number (40208220).

Almost surely, 2^154131487 is an apocalyptic number.

154131487 is a deficient number, since it is larger than the sum of its proper divisors (6701393).

154131487 is an equidigital number, since it uses as much as digits as its factorization.

154131487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6701392.

The product of its digits is 13440, while the sum is 34.

The square root of 154131487 is about 12414.9702778541. The cubic root of 154131487 is about 536.1633484743.

It can be divided in two parts, 15413 and 1487, that added together give a square (16900 = 130²).

The spelling of 154131487 in words is "one hundred fifty-four million, one hundred thirty-one thousand, four hundred eighty-seven".