1257048149 has 8 divisors (see below), whose sum is σ = 1436841600. Its totient is φ = 1077308496.

The previous prime is 1257048137. The next prime is 1257048209. The reversal of 1257048149 is 9418407521.

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 1257048149 - 2⁸ = 1257047893 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 (1257048349) 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, 79127 + ... + 93675.

It is an arithmetic number, because the mean of its divisors is an integer number (179605200).

Almost surely, 2^1257048149 is an apocalyptic number.

It is an amenable number.

1257048149 is a deficient number, since it is larger than the sum of its proper divisors (179793451).

1257048149 is a wasteful number, since it uses less digits than its factorization.

1257048149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26899.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 1257048149 is about 35454.8748270248. The cubic root of 1257048149 is about 1079.2381884677.

The spelling of 1257048149 in words is "one billion, two hundred fifty-seven million, forty-eight thousand, one hundred forty-nine".