1071642655 has 32 divisors (see below), whose sum is σ = 1438315200. Its totient is φ = 762918912.

The previous prime is 1071642641. The next prime is 1071642667. The reversal of 1071642655 is 5562461701.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1071642655 - 2¹⁷ = 1071511583 is a prime.

It is a super-2 number, since 2×1071642655² = 2296835960030898050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96679 + ... + 107191.

It is an arithmetic number, because the mean of its divisors is an integer number (44947350).

Almost surely, 2^1071642655 is an apocalyptic number.

1071642655 is a deficient number, since it is larger than the sum of its proper divisors (366672545).

1071642655 is a wasteful number, since it uses less digits than its factorization.

1071642655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10603.

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

The square root of 1071642655 is about 32735.9535526308. The cubic root of 1071642655 is about 1023.3322568103.

The spelling of 1071642655 in words is "one billion, seventy-one million, six hundred forty-two thousand, six hundred fifty-five".