126513250 has 32 divisors (see below), whose sum is σ = 238702464. Its totient is φ = 50206000.

The previous prime is 126513241. The next prime is 126513259. The reversal of 126513250 is 52315621.

126513250 = 206² + 207² + ... + 729².

It is an interprime number because it is at equal distance from previous prime (126513241) and next prime (126513259).

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (126513259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30819 + ... + 34681.

It is an arithmetic number, because the mean of its divisors is an integer number (7459452).

Almost surely, 2^126513250 is an apocalyptic number.

126513250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

126513250 is a deficient number, since it is larger than the sum of its proper divisors (112189214).

126513250 is a wasteful number, since it uses less digits than its factorization.

126513250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4011 (or 4001 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 126513250 is about 11247.8108981259. The cubic root of 126513250 is about 502.0095790302.

Adding to 126513250 its reverse (52315621), we get a palindrome (178828871).

The spelling of 126513250 in words is "one hundred twenty-six million, five hundred thirteen thousand, two hundred fifty".