1387051 has 4 divisors (see below), whose sum is σ = 1419352. Its totient is φ = 1354752.

The previous prime is 1387039. The next prime is 1387069. The reversal of 1387051 is 1507831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1507831 = 13 ⋅115987.

It is a 10-Lehmer number, since φ(1387051) divides (1387051-1)¹⁰.

It is a cyclic number.

It is not a de Polignac number, because 1387051 - 2¹¹ = 1385003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1387021) 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, 16086 + ... + 16171.

It is an arithmetic number, because the mean of its divisors is an integer number (354838).

2^1387051 is an apocalyptic number.

1387051 is a deficient number, since it is larger than the sum of its proper divisors (32301).

1387051 is an equidigital number, since it uses as much as digits as its factorization.

1387051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32300.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 1387051 is about 1177.7312936320. The cubic root of 1387051 is about 111.5229228880.

The spelling of 1387051 in words is "one million, three hundred eighty-seven thousand, fifty-one".