1290252671 has 4 divisors (see below), whose sum is σ = 1296938112. Its totient is φ = 1283567232.

The previous prime is 1290252661. The next prime is 1290252673. The reversal of 1290252671 is 1762520921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1290252671 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 (1290252673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3342431 + ... + 3342816.

It is an arithmetic number, because the mean of its divisors is an integer number (324234528).

Almost surely, 2^1290252671 is an apocalyptic number.

1290252671 is a deficient number, since it is larger than the sum of its proper divisors (6685441).

1290252671 is an equidigital number, since it uses as much as digits as its factorization.

1290252671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6685440.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 1290252671 is about 35920.0872910966. The cubic root of 1290252671 is about 1088.6583023079.

The spelling of 1290252671 in words is "one billion, two hundred ninety million, two hundred fifty-two thousand, six hundred seventy-one".