1292648397 has 8 divisors (see below), whose sum is σ = 1824915456. Its totient is φ = 811073472.

The previous prime is 1292648387. The next prime is 1292648453. The reversal of 1292648397 is 7938462921.

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

It is not a de Polignac number, because 1292648397 - 2⁶ = 1292648333 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51), and also a Moran number because the ratio is a prime number: 25346047 = 1292648397 / (1 + 2 + 9 + 2 + 6 + 4 + 8 + 3 + 9 + 7).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1292648387) 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 7 ways as a sum of consecutive naturals, for example, 12672973 + ... + 12673074.

It is an arithmetic number, because the mean of its divisors is an integer number (228114432).

Almost surely, 2^1292648397 is an apocalyptic number.

1292648397 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1292648397 is a deficient number, since it is larger than the sum of its proper divisors (532267059).

1292648397 is a wasteful number, since it uses less digits than its factorization.

1292648397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25346067.

The product of its digits is 1306368, while the sum is 51.

The square root of 1292648397 is about 35953.4198234327. The cubic root of 1292648397 is about 1089.3316883495.

The spelling of 1292648397 in words is "one billion, two hundred ninety-two million, six hundred forty-eight thousand, three hundred ninety-seven".