261435354 has 16 divisors (see below), whose sum is σ = 525043200. Its totient is φ = 86783040.

The previous prime is 261435353. The next prime is 261435359. The reversal of 261435354 is 453534162.

It is a super-2 number, since 2×261435354² = 136696888642210632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (261435353) 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, 88954 + ... + 91845.

It is an arithmetic number, because the mean of its divisors is an integer number (32815200).

Almost surely, 2^261435354 is an apocalyptic number.

261435354 is an abundant number, since it is smaller than the sum of its proper divisors (263607846).

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

261435354 is a wasteful number, since it uses less digits than its factorization.

261435354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181045.

The product of its digits is 43200, while the sum is 33.

The square root of 261435354 is about 16168.9626754471. The cubic root of 261435354 is about 639.4227819706.

The spelling of 261435354 in words is "two hundred sixty-one million, four hundred thirty-five thousand, three hundred fifty-four".