1290142550 has 12 divisors (see below), whose sum is σ = 2399665236. Its totient is φ = 516057000.

The previous prime is 1290142547. The next prime is 1290142577. The reversal of 1290142550 is 552410921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12901376 + ... + 12901475.

It is an arithmetic number, because the mean of its divisors is an integer number (199972103).

Almost surely, 2^1290142550 is an apocalyptic number.

1290142550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1290142550 is a deficient number, since it is larger than the sum of its proper divisors (1109522686).

1290142550 is a wasteful number, since it uses less digits than its factorization.

1290142550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25802863 (or 25802858 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 1290142550 is about 35918.5543974142. The cubic root of 1290142550 is about 1088.6273296789.

The spelling of 1290142550 in words is "one billion, two hundred ninety million, one hundred forty-two thousand, five hundred fifty".