1391212425 has 24 divisors (see below), whose sum is σ = 2435442336. Its totient is φ = 698333440.

The previous prime is 1391212409. The next prime is 1391212441. The reversal of 1391212425 is 5242121931.

1391212425 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1391212409) and next prime (1391212441).

It is not a de Polignac number, because 1391212425 - 2⁴ = 1391212409 is a prime.

It is a super-2 number, since 2×1391212425² = 3870944022948761250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1391212392 and 1391212401.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 544299 + ... + 546848.

It is an arithmetic number, because the mean of its divisors is an integer number (101476764).

Almost surely, 2^1391212425 is an apocalyptic number.

1391212425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1391212425 is a deficient number, since it is larger than the sum of its proper divisors (1044229911).

1391212425 is a wasteful number, since it uses less digits than its factorization.

1391212425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1091177 (or 1091172 counting only the distinct ones).

The product of its digits is 4320, while the sum is 30.

The square root of 1391212425 is about 37298.9601061477. The cubic root of 1391212425 is about 1116.3434174876.

The spelling of 1391212425 in words is "one billion, three hundred ninety-one million, two hundred twelve thousand, four hundred twenty-five".