1248136901 has 6 divisors (see below), whose sum is σ = 1371919206. Its totient is φ = 1134669800.

The previous prime is 1248136871. The next prime is 1248136913. The reversal of 1248136901 is 1096318421.

It can be written as a sum of positive squares in only one way, i.e., 925072225 + 323064676 = 30415^2 + 17974^2 .

It is not a de Polignac number, because 1248136901 - 2¹⁰ = 1248135877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1248132901) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5157470 + ... + 5157711.

It is an arithmetic number, because the mean of its divisors is an integer number (228653201).

Almost surely, 2^1248136901 is an apocalyptic number.

1248136901 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1248136901 is a deficient number, since it is larger than the sum of its proper divisors (123782305).

1248136901 is a wasteful number, since it uses less digits than its factorization.

1248136901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10315203 (or 10315192 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 1248136901 is about 35328.9810354049. The cubic root of 1248136901 is about 1076.6818888835.

The spelling of 1248136901 in words is "one billion, two hundred forty-eight million, one hundred thirty-six thousand, nine hundred one".