1201510403 has 4 divisors (see below), whose sum is σ = 1201683840. Its totient is φ = 1201336968.

The previous prime is 1201510393. The next prime is 1201510423. The reversal of 1201510403 is 3040151021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3040151021 = 17 ⋅178832413.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201510403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201510423) 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, 75875 + ... + 90332.

It is an arithmetic number, because the mean of its divisors is an integer number (300420960).

Almost surely, 2^1201510403 is an apocalyptic number.

1201510403 is a deficient number, since it is larger than the sum of its proper divisors (173437).

1201510403 is an equidigital number, since it uses as much as digits as its factorization.

1201510403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173436.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1201510403 is about 34662.8100851619. The cubic root of 1201510403 is about 1063.1042274480.

Adding to 1201510403 its reverse (3040151021), we get a palindrome (4241661424).

The spelling of 1201510403 in words is "one billion, two hundred one million, five hundred ten thousand, four hundred three".