1201503251 has 16 divisors (see below), whose sum is σ = 1314452160. Its totient is φ = 1091543040.

The previous prime is 1201503241. The next prime is 1201503307. The reversal of 1201503251 is 1523051021.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1201503251 - 2¹⁰ = 1201502227 is a prime.

It is a super-2 number, since 2×1201503251² = 2887220124327138002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201503241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1041491 + ... + 1042643.

It is an arithmetic number, because the mean of its divisors is an integer number (82153260).

Almost surely, 2^1201503251 is an apocalyptic number.

1201503251 is a deficient number, since it is larger than the sum of its proper divisors (112948909).

1201503251 is a wasteful number, since it uses less digits than its factorization.

1201503251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2366.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 1201503251 is about 34662.7069196853. The cubic root of 1201503251 is about 1063.1021180651.

Adding to 1201503251 its reverse (1523051021), we get a palindrome (2724554272).

The spelling of 1201503251 in words is "one billion, two hundred one million, five hundred three thousand, two hundred fifty-one".