261954102 has 16 divisors (see below), whose sum is σ = 551482560. Its totient is φ = 82722312.

The previous prime is 261954079. The next prime is 261954103. The reversal of 261954102 is 201459162.

It is a super-3 number, since 3×261954102³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 261954102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261954103) 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, 1148808 + ... + 1149035.

It is an arithmetic number, because the mean of its divisors is an integer number (34467660).

Almost surely, 2^261954102 is an apocalyptic number.

261954102 is an abundant number, since it is smaller than the sum of its proper divisors (289528458).

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

261954102 is a wasteful number, since it uses less digits than its factorization.

261954102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2297867.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 261954102 is about 16184.9962001849. The cubic root of 261954102 is about 639.8454232807.

The spelling of 261954102 in words is "two hundred sixty-one million, nine hundred fifty-four thousand, one hundred two".