1250194640 has 40 divisors (see below), whose sum is σ = 3006939240. Its totient is φ = 482832896.

The previous prime is 1250194579. The next prime is 1250194657. The reversal of 1250194640 is 464910521.

It can be written as a sum of positive squares in 4 ways, for example, as 533240464 + 716954176 = 23092^2 + 26776^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 1250194597 and 1250194606.

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, 267119 + ... + 271758.

It is an arithmetic number, because the mean of its divisors is an integer number (75173481).

Almost surely, 2^1250194640 is an apocalyptic number.

1250194640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1250194640 is an abundant number, since it is smaller than the sum of its proper divisors (1756744600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1250194640 is a wasteful number, since it uses less digits than its factorization.

1250194640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538919 (or 538913 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 1250194640 is about 35358.0915774593. The cubic root of 1250194640 is about 1077.2732540032.

The spelling of 1250194640 in words is "one billion, two hundred fifty million, one hundred ninety-four thousand, six hundred forty".