154157021 has 8 divisors (see below), whose sum is σ = 157967040. Its totient is φ = 150357312.

The previous prime is 154156997. The next prime is 154157033. The reversal of 154157021 is 120751451.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154157021 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 (154157041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33941 + ... + 38213.

It is an arithmetic number, because the mean of its divisors is an integer number (19745880).

Almost surely, 2^154157021 is an apocalyptic number.

It is an amenable number.

154157021 is a deficient number, since it is larger than the sum of its proper divisors (3810019).

154157021 is an equidigital number, since it uses as much as digits as its factorization.

154157021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5155.

The product of its (nonzero) digits is 1400, while the sum is 26.

The square root of 154157021 is about 12415.9985905283. The cubic root of 154157021 is about 536.1929544496.

The spelling of 154157021 in words is "one hundred fifty-four million, one hundred fifty-seven thousand, twenty-one".