1042661553 has 8 divisors (see below), whose sum is σ = 1450659648. Its totient is φ = 664885584.

The previous prime is 1042661539. The next prime is 1042661569. The reversal of 1042661553 is 3551662401.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1042661553 - 2⁸ = 1042661297 is a prime.

It is a super-2 number, since 2×1042661553² = 2174286228208743618, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1042661573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7555450 + ... + 7555587.

It is an arithmetic number, because the mean of its divisors is an integer number (181332456).

Almost surely, 2^1042661553 is an apocalyptic number.

It is an amenable number.

1042661553 is a deficient number, since it is larger than the sum of its proper divisors (407998095).

1042661553 is a wasteful number, since it uses less digits than its factorization.

1042661553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15111063.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 1042661553 is about 32290.2702528176. The cubic root of 1042661553 is about 1014.0229552203.

The spelling of 1042661553 in words is "one billion, forty-two million, six hundred sixty-one thousand, five hundred fifty-three".