1487201257 has 4 divisors (see below), whose sum is σ = 1489035856. Its totient is φ = 1485366660.

The previous prime is 1487201251. The next prime is 1487201263. The reversal of 1487201257 is 7521027841.

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 an interprime number because it is at equal distance from previous prime (1487201251) and next prime (1487201263).

It is a cyclic number.

It is not a de Polignac number, because 1487201257 - 2⁷ = 1487201129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1487201251) 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, 916083 + ... + 917704.

It is an arithmetic number, because the mean of its divisors is an integer number (372258964).

Almost surely, 2^1487201257 is an apocalyptic number.

It is an amenable number.

1487201257 is a deficient number, since it is larger than the sum of its proper divisors (1834599).

1487201257 is an equidigital number, since it uses as much as digits as its factorization.

1487201257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1834598.

The product of its (nonzero) digits is 31360, while the sum is 37.

The square root of 1487201257 is about 38564.2484303791. The cubic root of 1487201257 is about 1141.4491821882.

The spelling of 1487201257 in words is "one billion, four hundred eighty-seven million, two hundred one thousand, two hundred fifty-seven".