401220747 has 12 divisors (see below), whose sum is σ = 580804224. Its totient is φ = 266897520.

The previous prime is 401220737. The next prime is 401220761. The reversal of 401220747 is 747022104.

It is a happy number.

It is not a de Polignac number, because 401220747 - 2⁴ = 401220731 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 401220747.

It is not an unprimeable number, because it can be changed into a prime (401220737) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44203 + ... + 52500.

It is an arithmetic number, because the mean of its divisors is an integer number (48400352).

Almost surely, 2^401220747 is an apocalyptic number.

401220747 is a deficient number, since it is larger than the sum of its proper divisors (179583477).

401220747 is a wasteful number, since it uses less digits than its factorization.

401220747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97170 (or 97167 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 27.

The square root of 401220747 is about 20030.4954257252. The cubic root of 401220747 is about 737.5550835808. Note that the first 3 decimals are identical.

The spelling of 401220747 in words is "four hundred one million, two hundred twenty thousand, seven hundred forty-seven".