1401257970 has 192 divisors, whose sum is σ = 4334893056. Its totient is φ = 307307520.

The previous prime is 1401257933. The next prime is 1401257981. The reversal of 1401257970 is 797521041.

It is a happy number.

1401257970 is a `hidden beast` number, since 1 + 4 + 0 + 12 + 579 + 70 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3065982 + ... + 3066438.

It is an arithmetic number, because the mean of its divisors is an integer number (22577568).

Almost surely, 2^1401257970 is an apocalyptic number.

1401257970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1401257970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2167446528).

1401257970 is an abundant number, since it is smaller than the sum of its proper divisors (2933635086).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1401257970 is a wasteful number, since it uses less digits than its factorization.

1401257970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665 (or 662 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 36.

The square root of 1401257970 is about 37433.3804244287. The cubic root of 1401257970 is about 1119.0239077566.

The spelling of 1401257970 in words is "one billion, four hundred one million, two hundred fifty-seven thousand, nine hundred seventy".