1264015 has 8 divisors (see below), whose sum is σ = 1532448. Its totient is φ = 1000800.

The previous prime is 1264009. The next prime is 1264027. The reversal of 1264015 is 5104621.

1264015 = T₁₀₅ + T₁₀₆ + ... + T₂₀₅.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1264015 - 2⁷ = 1263887 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1263983 and 1264001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 747 + ... + 1756.

It is an arithmetic number, because the mean of its divisors is an integer number (191556).

2^1264015 is an apocalyptic number.

1264015 is a deficient number, since it is larger than the sum of its proper divisors (268433).

1264015 is a wasteful number, since it uses less digits than its factorization.

1264015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2609.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1264015 is about 1124.2842167353. The cubic root of 1264015 is about 108.1228312127.

Adding to 1264015 its reverse (5104621), we get a palindrome (6368636).

Subtracting 1264015 from its reverse (5104621), we obtain a triangular number (3840606 = T₂₇₇₁).

It can be divided in two parts, 12 and 64015, that multiplied together give a triangular number (768180 = T₁₂₃₉).

The spelling of 1264015 in words is "one million, two hundred sixty-four thousand, fifteen".