1390715 has 4 divisors (see below), whose sum is σ = 1668864. Its totient is φ = 1112568.

The previous prime is 1390709. The next prime is 1390729. The reversal of 1390715 is 5170931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5170931 = 509 ⋅10159.

It is a cyclic number.

It is not a de Polignac number, because 1390715 - 2⁴ = 1390699 is a prime.

It is a super-2 number, since 2×1390715² = 3868176422450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139067 + ... + 139076.

It is an arithmetic number, because the mean of its divisors is an integer number (417216).

2^1390715 is an apocalyptic number.

1390715 is a deficient number, since it is larger than the sum of its proper divisors (278149).

1390715 is an equidigital number, since it uses as much as digits as its factorization.

1390715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278148.

The product of its (nonzero) digits is 945, while the sum is 26.

The square root of 1390715 is about 1179.2858008134. The cubic root of 1390715 is about 111.6210352901.

The spelling of 1390715 in words is "one million, three hundred ninety thousand, seven hundred fifteen".