401261554 has 4 divisors (see below), whose sum is σ = 601892334. Its totient is φ = 200630776.

The previous prime is 401261543. The next prime is 401261579. The reversal of 401261554 is 455162104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 203718529 + 197543025 = 14273^2 + 14055^2 .

It is a super-2 number, since 2×401261554² = 322021669436989832, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100315387 + ... + 100315390.

Almost surely, 2^401261554 is an apocalyptic number.

401261554 is a deficient number, since it is larger than the sum of its proper divisors (200630780).

401261554 is a wasteful number, since it uses less digits than its factorization.

401261554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200630779.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 401261554 is about 20031.5140216610. The cubic root of 401261554 is about 737.5800875969.

The spelling of 401261554 in words is "four hundred one million, two hundred sixty-one thousand, five hundred fifty-four".