261145675 has 12 divisors (see below), whose sum is σ = 370080976. Its totient is φ = 179071200.

The previous prime is 261145673. The next prime is 261145691. The reversal of 261145675 is 576541162.

It is a happy number.

It is not a de Polignac number, because 261145675 - 2¹ = 261145673 is a prime.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (261145673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 745956 + ... + 746305.

Almost surely, 2^261145675 is an apocalyptic number.

261145675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

261145675 is a deficient number, since it is larger than the sum of its proper divisors (108935301).

261145675 is a wasteful number, since it uses less digits than its factorization.

261145675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1492278 (or 1492273 counting only the distinct ones).

The product of its digits is 50400, while the sum is 37.

The square root of 261145675 is about 16160.0023205444. The cubic root of 261145675 is about 639.1865275084.

The spelling of 261145675 in words is "two hundred sixty-one million, one hundred forty-five thousand, six hundred seventy-five".