401001240 has 32 divisors (see below), whose sum is σ = 1203004080. Its totient is φ = 106933632.

The previous prime is 401001217. The next prime is 401001269. The reversal of 401001240 is 42100104.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1670719 + ... + 1670958.

Almost surely, 2^401001240 is an apocalyptic number.

401001240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

401001240 is an abundant number, since it is smaller than the sum of its proper divisors (802002840).

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

401001240 is a wasteful number, since it uses less digits than its factorization.

401001240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3341691 (or 3341687 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 401001240 is about 20025.0153557994. The cubic root of 401001240 is about 737.4205541157.

Adding to 401001240 its reverse (42100104), we get a palindrome (443101344).

The spelling of 401001240 in words is "four hundred one million, one thousand, two hundred forty".