261501652 has 12 divisors (see below), whose sum is σ = 458541216. Its totient is φ = 130489880.

The previous prime is 261501631. The next prime is 261501707. The reversal of 261501652 is 256105162.

It is a super-2 number, since 2×261501652² = 136766227997458208, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 261501652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62974 + ... + 66997.

It is an arithmetic number, because the mean of its divisors is an integer number (38211768).

Almost surely, 2^261501652 is an apocalyptic number.

It is an amenable number.

261501652 is a deficient number, since it is larger than the sum of its proper divisors (197039564).

261501652 is a wasteful number, since it uses less digits than its factorization.

261501652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130478 (or 130476 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 261501652 is about 16171.0127079290. The cubic root of 261501652 is about 639.4768283062.

The spelling of 261501652 in words is "two hundred sixty-one million, five hundred one thousand, six hundred fifty-two".