1153420203 has 32 divisors (see below), whose sum is σ = 1706213376. Its totient is φ = 688480128.

The previous prime is 1153420201. The next prime is 1153420217. The reversal of 1153420203 is 3020243511.

It is not a de Polignac number, because 1153420203 - 2¹ = 1153420201 is a prime.

It is a super-2 number, since 2×1153420203² = 2660756329377122418, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1153420203.

It is not an unprimeable number, because it can be changed into a prime (1153420201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 551626 + ... + 553712.

It is an arithmetic number, because the mean of its divisors is an integer number (53319168).

Almost surely, 2^1153420203 is an apocalyptic number.

1153420203 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1153420203 is a deficient number, since it is larger than the sum of its proper divisors (552793173).

1153420203 is a wasteful number, since it uses less digits than its factorization.

1153420203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2523.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1153420203 is about 33962.0406189027. The cubic root of 1153420203 is about 1048.7271660552.

Adding to 1153420203 its reverse (3020243511), we get a palindrome (4173663714).

The spelling of 1153420203 in words is "one billion, one hundred fifty-three million, four hundred twenty thousand, two hundred three".