261435954 has 16 divisors (see below), whose sum is σ = 563092992. Its totient is φ = 80441808.

The previous prime is 261435947. The next prime is 261435961. The reversal of 261435954 is 459534162.

261435954 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (261435947) and next prime (261435961).

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1675794 + ... + 1675949.

It is an arithmetic number, because the mean of its divisors is an integer number (35193312).

Almost surely, 2^261435954 is an apocalyptic number.

261435954 is an abundant number, since it is smaller than the sum of its proper divisors (301657038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261435954 is a wasteful number, since it uses less digits than its factorization.

261435954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3351761.

The product of its digits is 129600, while the sum is 39.

The square root of 261435954 is about 16168.9812295024. The cubic root of 261435954 is about 639.4232711334.

The spelling of 261435954 in words is "two hundred sixty-one million, four hundred thirty-five thousand, nine hundred fifty-four".