1045642203 has 10 divisors (see below), whose sum is σ = 1562008844. Its totient is φ = 697094748.

The previous prime is 1045642201. The next prime is 1045642207. The reversal of 1045642203 is 3022465401.

1045642203 is a `hidden beast` number, since 1 + 0 + 456 + 4 + 2 + 203 = 666.

It is not a de Polignac number, because 1045642203 - 2¹ = 1045642201 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1045642201) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 6454501 + ... + 6454662.

Almost surely, 2^1045642203 is an apocalyptic number.

1045642203 is a deficient number, since it is larger than the sum of its proper divisors (516366641).

1045642203 is an equidigital number, since it uses as much as digits as its factorization.

1045642203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12909175 (or 12909166 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 1045642203 is about 32336.3913107199. The cubic root of 1045642203 is about 1014.9882962728.

The spelling of 1045642203 in words is "one billion, forty-five million, six hundred forty-two thousand, two hundred three".