154921057 has 4 divisors (see below), whose sum is σ = 155848896. Its totient is φ = 153993220.

The previous prime is 154921049. The next prime is 154921093. The reversal of 154921057 is 750129451.

154921057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 154921057 - 2³ = 154921049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154921097) 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, 463669 + ... + 464002.

It is an arithmetic number, because the mean of its divisors is an integer number (38962224).

Almost surely, 2^154921057 is an apocalyptic number.

It is an amenable number.

154921057 is a deficient number, since it is larger than the sum of its proper divisors (927839).

154921057 is an equidigital number, since it uses as much as digits as its factorization.

154921057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927838.

The product of its (nonzero) digits is 12600, while the sum is 34.

The square root of 154921057 is about 12446.7287670295. The cubic root of 154921057 is about 537.0773249634.

The spelling of 154921057 in words is "one hundred fifty-four million, nine hundred twenty-one thousand, fifty-seven".