154407861 has 12 divisors (see below), whose sum is σ = 230724780. Its totient is φ = 99388800.

The previous prime is 154407769. The next prime is 154407871. The reversal of 154407861 is 168704451.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 37638225 + 116769636 = 6135^2 + 10806^2 .

It is not a de Polignac number, because 154407861 - 2¹³ = 154399669 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154407871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 295540 + ... + 296061.

It is an arithmetic number, because the mean of its divisors is an integer number (19227065).

Almost surely, 2^154407861 is an apocalyptic number.

It is an amenable number.

154407861 is a deficient number, since it is larger than the sum of its proper divisors (76316919).

154407861 is a wasteful number, since it uses less digits than its factorization.

154407861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591636 (or 591633 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 154407861 is about 12426.0959677608. The cubic root of 154407861 is about 536.4836229185.

The spelling of 154407861 in words is "one hundred fifty-four million, four hundred seven thousand, eight hundred sixty-one".