1372247287 has 4 divisors (see below), whose sum is σ = 1385072136. Its totient is φ = 1359422440.

The previous prime is 1372247273. The next prime is 1372247299. The reversal of 1372247287 is 7827422731.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1372247287 - 2⁷ = 1372247159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1372247257) 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, 6412264 + ... + 6412477.

It is an arithmetic number, because the mean of its divisors is an integer number (346268034).

Almost surely, 2^1372247287 is an apocalyptic number.

1372247287 is a deficient number, since it is larger than the sum of its proper divisors (12824849).

1372247287 is a wasteful number, since it uses less digits than its factorization.

1372247287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12824848.

The product of its digits is 263424, while the sum is 43.

The square root of 1372247287 is about 37043.8562652432. The cubic root of 1372247287 is about 1111.2474914904.

It can be divided in two parts, 13722 and 47287, that added together give a square (61009 = 247²).

The spelling of 1372247287 in words is "one billion, three hundred seventy-two million, two hundred forty-seven thousand, two hundred eighty-seven".