261200445 has 16 divisors (see below), whose sum is σ = 455913792. Its totient is φ = 126642560.

The previous prime is 261200441. The next prime is 261200453. The reversal of 261200445 is 544002162.

It is not a de Polignac number, because 261200445 - 2² = 261200441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261200441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 791352 + ... + 791681.

It is an arithmetic number, because the mean of its divisors is an integer number (28494612).

Almost surely, 2^261200445 is an apocalyptic number.

It is an amenable number.

261200445 is a deficient number, since it is larger than the sum of its proper divisors (194713347).

261200445 is a wasteful number, since it uses less digits than its factorization.

261200445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1583052.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 261200445 is about 16161.6968477942. The cubic root of 261200445 is about 639.2312098477.

The spelling of 261200445 in words is "two hundred sixty-one million, two hundred thousand, four hundred forty-five".