1055401987 has 8 divisors (see below), whose sum is σ = 1112479760. Its totient is φ = 998477280.

The previous prime is 1055401981. The next prime is 1055402003. The reversal of 1055401987 is 7891045501.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1055401987 - 2⁷ = 1055401859 is a prime.

It is a super-2 number, since 2×1055401987² = 2227746708327096338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1055401981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23964 + ... + 51817.

It is an arithmetic number, because the mean of its divisors is an integer number (139059970).

Almost surely, 2^1055401987 is an apocalyptic number.

1055401987 is a deficient number, since it is larger than the sum of its proper divisors (57077773).

1055401987 is an equidigital number, since it uses as much as digits as its factorization.

1055401987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76533.

The product of its (nonzero) digits is 50400, while the sum is 40.

The square root of 1055401987 is about 32486.9510265276. The cubic root of 1055401987 is about 1018.1364110609.

The spelling of 1055401987 in words is "one billion, fifty-five million, four hundred one thousand, nine hundred eighty-seven".