1399106925 has 60 divisors (see below), whose sum is σ = 2599893120. Its totient is φ = 743813280.

The previous prime is 1399106921. The next prime is 1399106927. The reversal of 1399106925 is 5296019931.

It is a happy number.

It is not a de Polignac number, because 1399106925 - 2² = 1399106921 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399106921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 766564 + ... + 768386.

It is an arithmetic number, because the mean of its divisors is an integer number (43331552).

Almost surely, 2^1399106925 is an apocalyptic number.

1399106925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1399106925 is a deficient number, since it is larger than the sum of its proper divisors (1200786195).

1399106925 is a wasteful number, since it uses less digits than its factorization.

1399106925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2224 (or 2210 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 45.

The square root of 1399106925 is about 37404.6377472099. The cubic root of 1399106925 is about 1118.4510169285.

The spelling of 1399106925 in words is "one billion, three hundred ninety-nine million, one hundred six thousand, nine hundred twenty-five".