1249491977 has 8 divisors (see below), whose sum is σ = 1253450880. Its totient is φ = 1245540240.

The previous prime is 1249491953. The next prime is 1249492001. The reversal of 1249491977 is 7791949421.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1249491953) and next prime (1249492001).

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 1249491977 - 2²⁶ = 1182383113 is a prime.

It is a super-2 number, since 2×1249491977² = 3122460401174737058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1249491937) 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, 788528 + ... + 790110.

It is an arithmetic number, because the mean of its divisors is an integer number (156681360).

Almost surely, 2^1249491977 is an apocalyptic number.

It is an amenable number.

1249491977 is a deficient number, since it is larger than the sum of its proper divisors (3958903).

1249491977 is a wasteful number, since it uses less digits than its factorization.

1249491977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3583.

The product of its digits is 1143072, while the sum is 53.

The square root of 1249491977 is about 35348.1537990317. The cubic root of 1249491977 is about 1077.0713915915.

The spelling of 1249491977 in words is "one billion, two hundred forty-nine million, four hundred ninety-one thousand, nine hundred seventy-seven".