1391294974 has 8 divisors (see below), whose sum is σ = 2100763728. Its totient is φ = 691040400.

The previous prime is 1391294963. The next prime is 1391295013. The reversal of 1391294974 is 4794921931.

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

It is a congruent 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, 2303167 + ... + 2303770.

It is an arithmetic number, because the mean of its divisors is an integer number (262595466).

Almost surely, 2^1391294974 is an apocalyptic number.

1391294974 is a deficient number, since it is larger than the sum of its proper divisors (709468754).

1391294974 is a wasteful number, since it uses less digits than its factorization.

1391294974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4607090.

The product of its digits is 489888, while the sum is 49.

The square root of 1391294974 is about 37300.0666755436. The cubic root of 1391294974 is about 1116.3654968404.

The spelling of 1391294974 in words is "one billion, three hundred ninety-one million, two hundred ninety-four thousand, nine hundred seventy-four".