261154004 has 6 divisors (see below), whose sum is σ = 457019514. Its totient is φ = 130577000.

The previous prime is 261153979. The next prime is 261154009. The reversal of 261154004 is 400451162.

261154004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 171662404 + 89491600 = 13102^2 + 9460^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261154009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32644247 + ... + 32644254.

It is an arithmetic number, because the mean of its divisors is an integer number (76169919).

Almost surely, 2^261154004 is an apocalyptic number.

It is an amenable number.

261154004 is a deficient number, since it is larger than the sum of its proper divisors (195865510).

261154004 is a wasteful number, since it uses less digits than its factorization.

261154004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65288505 (or 65288503 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 261154004 is about 16160.2600226605. The cubic root of 261154004 is about 639.1933228574.

The spelling of 261154004 in words is "two hundred sixty-one million, one hundred fifty-four thousand, four".