1055561279 has 4 divisors (see below), whose sum is σ = 1058391576. Its totient is φ = 1052730984.

The previous prime is 1055561261. The next prime is 1055561281. The reversal of 1055561279 is 9721655501.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1055561279 is a prime.

It is a super-2 number, since 2×1055561279² = 2228419227448231682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1055561249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1414589 + ... + 1415334.

It is an arithmetic number, because the mean of its divisors is an integer number (264597894).

Almost surely, 2^1055561279 is an apocalyptic number.

1055561279 is a deficient number, since it is larger than the sum of its proper divisors (2830297).

1055561279 is an equidigital number, since it uses as much as digits as its factorization.

1055561279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2830296.

The product of its (nonzero) digits is 94500, while the sum is 41.

The square root of 1055561279 is about 32489.4025645286. The cubic root of 1055561279 is about 1018.1876309842.

The spelling of 1055561279 in words is "one billion, fifty-five million, five hundred sixty-one thousand, two hundred seventy-nine".