261102402 has 24 divisors (see below), whose sum is σ = 617151600. Its totient is φ = 79121880.

The previous prime is 261102397. The next prime is 261102469. The reversal of 261102402 is 204201162.

261102402 is a `hidden beast` number, since 261 + 1 + 0 + 2 + 402 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 659152 + ... + 659547.

It is an arithmetic number, because the mean of its divisors is an integer number (25714650).

Almost surely, 2^261102402 is an apocalyptic number.

261102402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

261102402 is an abundant number, since it is smaller than the sum of its proper divisors (356049198).

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

261102402 is a wasteful number, since it uses less digits than its factorization.

261102402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1318718 (or 1318715 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 261102402 is about 16158.6633729402. The cubic root of 261102402 is about 639.1512202078.

Adding to 261102402 its reverse (204201162), we get a palindrome (465303564).

The spelling of 261102402 in words is "two hundred sixty-one million, one hundred two thousand, four hundred two".