1248138206 has 16 divisors (see below), whose sum is σ = 2146509024. Its totient is φ = 533205504.

The previous prime is 1248138197. The next prime is 1248138239. The reversal of 1248138206 is 6028318421.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138035 + ... + 146798.

It is an arithmetic number, because the mean of its divisors is an integer number (134156814).

Almost surely, 2^1248138206 is an apocalyptic number.

1248138206 is a deficient number, since it is larger than the sum of its proper divisors (898370818).

1248138206 is a wasteful number, since it uses less digits than its factorization.

1248138206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285155.

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 1248138206 is about 35328.9995046562. Note that the first 3 decimals coincide. The cubic root of 1248138206 is about 1076.6822641279.

Adding to 1248138206 its sum of digits (35), we get a square (1248138241 = 35329²).

The spelling of 1248138206 in words is "one billion, two hundred forty-eight million, one hundred thirty-eight thousand, two hundred six".