154521397 has 8 divisors (see below), whose sum is σ = 156050496. Its totient is φ = 153000192.

The previous prime is 154521377. The next prime is 154521407. The reversal of 154521397 is 793125451.

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 154521397 - 2¹¹ = 154519349 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 (154521377) 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, 42048 + ... + 45574.

It is an arithmetic number, because the mean of its divisors is an integer number (19506312).

Almost surely, 2^154521397 is an apocalyptic number.

It is an amenable number.

154521397 is a deficient number, since it is larger than the sum of its proper divisors (1529099).

154521397 is a wasteful number, since it uses less digits than its factorization.

154521397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3947.

The product of its digits is 37800, while the sum is 37.

The square root of 154521397 is about 12430.6635784257. The cubic root of 154521397 is about 536.6150827229.

The spelling of 154521397 in words is "one hundred fifty-four million, five hundred twenty-one thousand, three hundred ninety-seven".