138454457 has 8 divisors (see below), whose sum is σ = 144655296. Its totient is φ = 132268752.

The previous prime is 138454429. The next prime is 138454483. The reversal of 138454457 is 754454831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138454457 - 2¹⁴ = 138438073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138454427) 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 7 ways as a sum of consecutive naturals, for example, 17543 + ... + 24179.

It is an arithmetic number, because the mean of its divisors is an integer number (18081912).

Almost surely, 2^138454457 is an apocalyptic number.

It is an amenable number.

138454457 is a deficient number, since it is larger than the sum of its proper divisors (6200839).

138454457 is an equidigital number, since it uses as much as digits as its factorization.

138454457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7567.

The product of its digits is 268800, while the sum is 41.

The square root of 138454457 is about 11766.6672001888. The cubic root of 138454457 is about 517.3315680165.

The spelling of 138454457 in words is "one hundred thirty-eight million, four hundred fifty-four thousand, four hundred fifty-seven".