1248151661 has 8 divisors (see below), whose sum is σ = 1253988000. Its totient is φ = 1242324720.

The previous prime is 1248151657. The next prime is 1248151691. The reversal of 1248151661 is 1661518421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1248151661 - 2² = 1248151657 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 (1248151691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 455666 + ... + 458396.

It is an arithmetic number, because the mean of its divisors is an integer number (156748500).

Almost surely, 2^1248151661 is an apocalyptic number.

It is an amenable number.

1248151661 is a deficient number, since it is larger than the sum of its proper divisors (5836339).

1248151661 is a wasteful number, since it uses less digits than its factorization.

1248151661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4699.

The product of its digits is 11520, while the sum is 35.

The square root of 1248151661 is about 35329.1899284430. The cubic root of 1248151661 is about 1076.6861330125.

The spelling of 1248151661 in words is "one billion, two hundred forty-eight million, one hundred fifty-one thousand, six hundred sixty-one".