154921845 has 16 divisors (see below), whose sum is σ = 266942592. Its totient is φ = 76269120.

The previous prime is 154921831. The next prime is 154921847. The reversal of 154921845 is 548129451.

It is not a de Polignac number, because 154921845 - 2⁸ = 154921589 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154921847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 397041 + ... + 397430.

It is an arithmetic number, because the mean of its divisors is an integer number (16683912).

Almost surely, 2^154921845 is an apocalyptic number.

154921845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

154921845 is a deficient number, since it is larger than the sum of its proper divisors (112020747).

154921845 is a wasteful number, since it uses less digits than its factorization.

154921845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794492.

The product of its digits is 57600, while the sum is 39.

The square root of 154921845 is about 12446.7604218929. The cubic root of 154921845 is about 537.0782355696.

The spelling of 154921845 in words is "one hundred fifty-four million, nine hundred twenty-one thousand, eight hundred forty-five".