1672651257 has 4 divisors (see below), whose sum is σ = 2230201680. Its totient is φ = 1115100836.

The previous prime is 1672651247. The next prime is 1672651297. The reversal of 1672651257 is 7521562761.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1672651257 - 2¹⁹ = 1672126969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1672651247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278775207 + ... + 278775212.

It is an arithmetic number, because the mean of its divisors is an integer number (557550420).

Almost surely, 2^1672651257 is an apocalyptic number.

It is an amenable number.

1672651257 is a deficient number, since it is larger than the sum of its proper divisors (557550423).

1672651257 is an equidigital number, since it uses as much as digits as its factorization.

1672651257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557550422.

The product of its digits is 176400, while the sum is 42.

The square root of 1672651257 is about 40898.0593304866. The cubic root of 1672651257 is about 1187.0485096124.

The spelling of 1672651257 in words is "one billion, six hundred seventy-two million, six hundred fifty-one thousand, two hundred fifty-seven".