1249010521 has 12 divisors (see below), whose sum is σ = 1377335232. Its totient is φ = 1131779000.

The previous prime is 1249010489. The next prime is 1249010527. The reversal of 1249010521 is 1250109421.

It is a happy number.

It is not a de Polignac number, because 1249010521 - 2⁵ = 1249010489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1249010527) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21036 + ... + 54226.

It is an arithmetic number, because the mean of its divisors is an integer number (114777936).

Almost surely, 2^1249010521 is an apocalyptic number.

1249010521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1249010521 is a deficient number, since it is larger than the sum of its proper divisors (128324711).

1249010521 is a wasteful number, since it uses less digits than its factorization.

1249010521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33524 (or 33513 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 1249010521 is about 35341.3429427915. The cubic root of 1249010521 is about 1076.9330342665.

Adding to 1249010521 its reverse (1250109421), we get a palindrome (2499119942).

The spelling of 1249010521 in words is "one billion, two hundred forty-nine million, ten thousand, five hundred twenty-one".